Remove unused settings and env vars (#58580)

Found while cleaning up sourcegraph.com

cmd/frontend/BUILD.bazel

@@ -56,7 +56,6 @@ oci_image(
         "CODEINTEL_PGPORT": "5432",
         "CODEINTEL_PGSSLMODE": "disable",
         "CODEINTEL_PGUSER": "sg",
-        "PUBLIC_REPO_REDIRECTS": "true",
     },
     tars = [":tar_frontend"],
     user = "sourcegraph",

internal/settings/settings_test.go

@@ -154,16 +154,16 @@ func TestMergeSettings(t *testing.T) {
 	}, {
 		name: "merge int",
 		left: &schema.Settings{
-			SearchContextLines:                        0,
-			CodeIntelligenceAutoIndexPopularRepoLimit: 1,
+			SearchContextLines:     0,
+			HistoryDefaultPageSize: 1,
 		},
 		right: &schema.Settings{
-			SearchContextLines:                        1,
-			CodeIntelligenceAutoIndexPopularRepoLimit: 0, // This is the zero value, so will not override a previous non-zero value
+			SearchContextLines:     1,
+			HistoryDefaultPageSize: 0, // This is the zero value, so will not override a previous non-zero value
 		},
 		expected: &schema.Settings{
-			SearchContextLines:                        1,
-			CodeIntelligenceAutoIndexPopularRepoLimit: 1, // This is the zero value, so will not override a previous non-zero value
+			SearchContextLines:     1,
+			HistoryDefaultPageSize: 1, // This is the zero value, so will not override a previous non-zero value
 		},
 	}, {
 		name: "deep merge struct pointer",

schema/schema.go

@@ -2229,8 +2229,6 @@ type Settings struct {
 	CodeIntelMixPreciseAndSearchBasedReferences bool `json:"codeIntel.mixPreciseAndSearchBasedReferences,omitempty"`
 	// CodeIntelTraceExtension description: Whether to enable trace logging on the extension.
 	CodeIntelTraceExtension bool `json:"codeIntel.traceExtension,omitempty"`
-	// CodeIntelligenceAutoIndexPopularRepoLimit description: Up to this number of repos are auto-indexed automatically. Ordered by star count.
-	CodeIntelligenceAutoIndexPopularRepoLimit int `json:"codeIntelligence.autoIndexPopularRepoLimit,omitempty"`
 	// ExperimentalFeatures description: Experimental features and settings.
 	ExperimentalFeatures *SettingsExperimentalFeatures `json:"experimentalFeatures,omitempty"`
 	// FileSidebarVisibleByDefault description: Whether the sidebar on the repo view should be open by default.
@@ -2326,7 +2324,6 @@ func (v *Settings) UnmarshalJSON(data []byte) error {
 	delete(m, "codeIntel.disableSearchBased")
 	delete(m, "codeIntel.mixPreciseAndSearchBasedReferences")
 	delete(m, "codeIntel.traceExtension")
-	delete(m, "codeIntelligence.autoIndexPopularRepoLimit")
 	delete(m, "experimentalFeatures")
 	delete(m, "fileSidebarVisibleByDefault")
 	delete(m, "history.defaultPageSize")

schema/settings.schema.json

@@ -370,12 +370,6 @@
       "description": "The timeout (in milliseconds) for un-indexed search requests.",
       "type": "number"
     },
-    "codeIntelligence.autoIndexPopularRepoLimit": {
-      "description": "Up to this number of repos are auto-indexed automatically. Ordered by star count.",
-      "type": "integer",
-      "minimum": 0,
-      "default": 0
-    },
     "search.contextLines": {
       "description": "The default number of lines to show as context below and above search results. Default is 1.",
       "type": "integer",