diff --git a/cmd/blobstore/internal/blobstore/blobstore.go b/cmd/blobstore/internal/blobstore/blobstore.go
index 7c26f3e2111..32fa38ec18e 100644
--- a/cmd/blobstore/internal/blobstore/blobstore.go
+++ b/cmd/blobstore/internal/blobstore/blobstore.go
@@ -136,8 +136,4 @@ var (
 		Name: "blobstore_service_running",
 		Help: "Number of running blobstore requests.",
 	})
-	metricRequestTotal = promauto.NewCounterVec(prometheus.CounterOpts{
-		Name: "blobstore_service_request_total",
-		Help: "Number of returned blobstore requests.",
-	}, []string{"code"})
 )
diff --git a/cmd/frontend/graphqlbackend/slow_requests_tracer.go b/cmd/frontend/graphqlbackend/slow_requests_tracer.go
index f5f27b0bfa2..15e285e2c45 100644
--- a/cmd/frontend/graphqlbackend/slow_requests_tracer.go
+++ b/cmd/frontend/graphqlbackend/slow_requests_tracer.go
@@ -20,9 +20,6 @@ import (
 	"github.com/sourcegraph/sourcegraph/lib/errors"
 )
 
-// slowRequestRedisFIFOListDefaultSize sets a default value for the FIFO list.
-const slowRequestRedisFIFOListDefaultSize = 5000
-
 // slowRequestRedisFIFOListPerPage sets the default count of returned request.
 const slowRequestRedisFIFOListPerPage = 50
 
diff --git a/cmd/gitserver/server/vcs_syncer_ruby_packages.go b/cmd/gitserver/server/vcs_syncer_ruby_packages.go
index 9a3679cc4c0..e9a9bb83445 100644
--- a/cmd/gitserver/server/vcs_syncer_ruby_packages.go
+++ b/cmd/gitserver/server/vcs_syncer_ruby_packages.go
@@ -38,8 +38,7 @@ func NewRubyPackagesSyncer(
 }
 
 type rubyDependencySource struct {
-	repositoryURL string
-	client        *rubygems.Client
+	client *rubygems.Client
 }
 
 func (rubyDependencySource) ParseVersionedPackageFromNameAndVersion(name reposource.PackageName, version string) (reposource.VersionedPackage, error) {
diff --git a/dev/sg/internal/bk/bk.go b/dev/sg/internal/bk/bk.go
index 0cbd5ce2d52..68906521721 100644
--- a/dev/sg/internal/bk/bk.go
+++ b/dev/sg/internal/bk/bk.go
@@ -17,13 +17,9 @@ import (
 	"github.com/sourcegraph/sourcegraph/lib/output"
 )
 
-// https://buildkite.com/sourcegraph
+// BuildkiteOrg is a Sourcegraph org in Buildkite. See: is https://buildkite.com/sourcegraph
 const BuildkiteOrg = "sourcegraph"
 
-type buildkiteSecrets struct {
-	Token string `json:"token"`
-}
-
 type Build struct {
 	buildkite.Build
 }
diff --git a/enterprise/internal/codeintel/codenav/init.go b/enterprise/internal/codeintel/codenav/init.go
index 7fe963f75e1..78b9796f1b1 100644
--- a/enterprise/internal/codeintel/codenav/init.go
+++ b/enterprise/internal/codeintel/codenav/init.go
@@ -27,14 +27,6 @@ func NewService(
 	)
 }
 
-type serviceDependencies struct {
-	db             database.DB
-	codeIntelDB    codeintelshared.CodeIntelDB
-	uploadSvc      UploadService
-	gitserver      GitserverClient
-	observationCtx *observation.Context
-}
-
 func scopedContext(component string, parent *observation.Context) *observation.Context {
 	return observation.ScopedContext("codeintel", "codenav", component, parent)
 }
diff --git a/enterprise/internal/codeintel/policies/init.go b/enterprise/internal/codeintel/policies/init.go
index 9a5a1019984..333e6591ed3 100644
--- a/enterprise/internal/codeintel/policies/init.go
+++ b/enterprise/internal/codeintel/policies/init.go
@@ -24,13 +24,6 @@ func NewService(
 	)
 }
 
-type serviceDependencies struct {
-	db             database.DB
-	uploadSvc      UploadService
-	gitserver      GitserverClient
-	observationCtx *observation.Context
-}
-
 func scopedContext(component string, parent *observation.Context) *observation.Context {
 	return observation.ScopedContext("codeintel", "policies", component, parent)
 }
diff --git a/internal/authz/sub_repo_perms.go b/internal/authz/sub_repo_perms.go
index 570d93ea221..20e66c12a52 100644
--- a/internal/authz/sub_repo_perms.go
+++ b/internal/authz/sub_repo_perms.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"io/fs"
 	"strconv"
-	"strings"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -63,11 +62,11 @@ var DefaultSubRepoPermsChecker SubRepoPermissionChecker = &noopPermsChecker{}
 
 type noopPermsChecker struct{}
 
-func (*noopPermsChecker) Permissions(ctx context.Context, userID int32, content RepoContent) (Perms, error) {
+func (*noopPermsChecker) Permissions(_ context.Context, _ int32, _ RepoContent) (Perms, error) {
 	return None, nil
 }
 
-func (*noopPermsChecker) FilePermissionsFunc(ctx context.Context, userID int32, repo api.RepoName) (FilePermissionFunc, error) {
+func (*noopPermsChecker) FilePermissionsFunc(_ context.Context, _ int32, _ api.RepoName) (FilePermissionFunc, error) {
 	return func(path string) (Perms, error) {
 		return None, nil
 	}, nil
@@ -77,54 +76,14 @@ func (*noopPermsChecker) Enabled() bool {
 	return false
 }
 
-func (*noopPermsChecker) EnabledForRepoID(ctx context.Context, repoID api.RepoID) (bool, error) {
+func (*noopPermsChecker) EnabledForRepoID(_ context.Context, _ api.RepoID) (bool, error) {
 	return false, nil
 }
 
-func (*noopPermsChecker) EnabledForRepo(ctx context.Context, repo api.RepoName) (bool, error) {
+func (*noopPermsChecker) EnabledForRepo(_ context.Context, _ api.RepoName) (bool, error) {
 	return false, nil
 }
 
-// filePermissionsFuncAllRead is a FilePermissionFunc which _always_ returns
-// Read. Only use in cases that sub repo permission checks should not be done.
-func filePermissionsFuncAllRead(_ string) (Perms, error) {
-	return Read, nil
-}
-
-// expandDirs will return a new set of rules that will match all directories
-// above the supplied rule. As a special case, if the rule starts with a wildcard
-// we return a rule to match all directories.
-func expandDirs(rule string) []string {
-	dirs := make([]string, 0)
-
-	// Make sure the rule starts with a slash
-	if !strings.HasPrefix(rule, "/") {
-		rule = "/" + rule
-	}
-
-	// If a rule starts with a wildcard it can match at any level in the tree
-	// structure so there's no way of walking up the tree and expand out to the list
-	// of valid directories. Instead, we just return a rule that matches any
-	// directory
-	if strings.HasPrefix(rule, "/*") {
-		dirs = append(dirs, "**/")
-		return dirs
-	}
-
-	for {
-		lastSlash := strings.LastIndex(rule, "/")
-		if lastSlash <= 0 { // we have to ignore the slash at index 0
-			break
-		}
-		// Drop anything after the last slash
-		rule = rule[:lastSlash]
-
-		dirs = append(dirs, rule+"/")
-	}
-
-	return dirs
-}
-
 // ActorPermissions returns the level of access the given actor has for the requested
 // content.
 //
diff --git a/internal/codeintel/dependencies/init.go b/internal/codeintel/dependencies/init.go
index 77ba208805a..2d3045ddf7f 100644
--- a/internal/codeintel/dependencies/init.go
+++ b/internal/codeintel/dependencies/init.go
@@ -12,13 +12,8 @@ func NewService(observationCtx *observation.Context, db database.DB) *Service {
 	return newService(scopedContext("service", observationCtx), store.New(scopedContext("store", observationCtx), db))
 }
 
-type serviceDependencies struct {
-	db             database.DB
-	observationCtx *observation.Context
-}
-
 // TestService creates a new dependencies service with noop observation contexts.
-func TestService(db database.DB, gitserver GitserverClient) *Service {
+func TestService(db database.DB, _ GitserverClient) *Service {
 	store := store.New(&observation.TestContext, db)
 
 	return newService(&observation.TestContext, store)
diff --git a/internal/extsvc/gitlab/client.go b/internal/extsvc/gitlab/client.go
index 0fa8b3612bc..4e6d7927974 100644
--- a/internal/extsvc/gitlab/client.go
+++ b/internal/extsvc/gitlab/client.go
@@ -178,8 +178,6 @@ type Client struct {
 	Auth             auth.Authenticator
 	rateLimitMonitor *ratelimit.Monitor
 	rateLimiter      *ratelimit.InstrumentedLimiter // Our internal rate limiter
-
-	tokenRefresher oauthutil.TokenRefresher
 }
 
 // newClient creates a new GitLab API client with an optional personal access token to authenticate requests.
diff --git a/internal/oauthutil/oauth2.go b/internal/oauthutil/oauth2.go
index 179741cd3ab..583e8d6ed63 100644
--- a/internal/oauthutil/oauth2.go
+++ b/internal/oauthutil/oauth2.go
@@ -2,10 +2,7 @@ package oauthutil
 
 import (
 	"context"
-	"encoding/json"
-	"fmt"
 	"net/http"
-	"strings"
 
 	"golang.org/x/oauth2"
 
@@ -32,32 +29,6 @@ type OAuthContext struct {
 	Scopes []string
 }
 
-type oauthError struct {
-	Err              string `json:"error"`
-	ErrorDescription string `json:"error_description"`
-}
-
-func (e oauthError) Error() string {
-	return fmt.Sprintf("OAuth response error %q description %q", e.Err, e.ErrorDescription)
-}
-
-// getOAuthErrorDetails is a method that only returns OAuth errors.
-// It is intended to be used in the oauth flow, when refreshing an expired token.
-func getOAuthErrorDetails(body []byte) error {
-	var oe oauthError
-	if err := json.Unmarshal(body, &oe); err != nil {
-		// If we failed to unmarshal body with oauth error, it's not oauthError and we should return nil.
-		return nil
-	}
-
-	// https://www.oauth.com/oauth2-servers/access-tokens/access-token-response/
-	// {"error":"invalid_token","error_description":"Token is expired. You can either do re-authorization or token refresh."}
-	if oe.Err == "invalid_token" && strings.Contains(oe.ErrorDescription, "expired") {
-		return &oe
-	}
-	return nil
-}
-
 // TokenRefresher is a function to refresh and return the new OAuth token.
 type TokenRefresher func(ctx context.Context, doer httpcli.Doer, oauthCtx OAuthContext) (*auth.OAuthBearerToken, error)
 
diff --git a/internal/repos/syncer.go b/internal/repos/syncer.go
index f9b6c940576..e62094095ff 100644
--- a/internal/repos/syncer.go
+++ b/internal/repos/syncer.go
@@ -107,7 +107,7 @@ type syncHandler struct {
 	minSyncInterval func() time.Duration
 }
 
-func (s *syncHandler) Handle(ctx context.Context, logger log.Logger, sj *SyncJob) (err error) {
+func (s *syncHandler) Handle(ctx context.Context, _ log.Logger, sj *SyncJob) (err error) {
 	// Limit calls to progressRecorder as it will most likely hit the database
 	progressLimiter := rate.NewLimiter(rate.Limit(1.0), 1)
 
diff --git a/internal/search/repos/repos.go b/internal/search/repos/repos.go
index 119a9b59f39..e57e6568ebf 100644
--- a/internal/search/repos/repos.go
+++ b/internal/search/repos/repos.go
@@ -944,22 +944,6 @@ func optimizeRepoPatternWithHeuristics(repoPattern string) string {
 	return repoPattern
 }
 
-type badRequestError struct {
-	err error
-}
-
-func (e *badRequestError) BadRequest() bool {
-	return true
-}
-
-func (e *badRequestError) Error() string {
-	return "bad request: " + e.err.Error()
-}
-
-func (e *badRequestError) Cause() error {
-	return e.err
-}
-
 var ErrNoResolvedRepos = errors.New("no resolved repositories")
 
 type MissingRepoRevsError struct {
diff --git a/lib/batches/changeset_specs.go b/lib/batches/changeset_specs.go
index 9d3e38f34d3..bc0d364788f 100644
--- a/lib/batches/changeset_specs.go
+++ b/lib/batches/changeset_specs.go
@@ -12,8 +12,6 @@ import (
 	"github.com/sourcegraph/sourcegraph/lib/errors"
 )
 
-var errOptionalPublishedUnsupported = NewValidationError(errors.New(`This Sourcegraph version requires the "published" field to be specified in the batch spec; upgrade to version 3.30.0 or later to be able to omit the published field and control publication from the UI.`))
-
 // Repository is a repository in which the steps of a batch spec are executed.
 //
 // It is part of the cache.ExecutionKey, so changes to the names of fields here
diff --git a/lib/codeintel/lsif/scip/document.go b/lib/codeintel/lsif/scip/document.go
index a3382ab9888..469d42624a3 100644
--- a/lib/codeintel/lsif/scip/document.go
+++ b/lib/codeintel/lsif/scip/document.go
@@ -297,16 +297,3 @@ func extractLanguageFromIndexerName(indexerName string) string {
 
 	return ""
 }
-
-// flattenNonEmptyMap returns an ordered slice of the keys from the given map, excluding the empty string.
-func flattenNonEmptyMap(m map[string]struct{}) []string {
-	s := make([]string, 0, len(m))
-	for k := range m {
-		if k != "" {
-			s = append(s, k)
-		}
-	}
-	sort.Strings(s)
-
-	return s
-}