Remove react-bootstrap@1 (#45081)

Nobody seems to want it, but I think there's a technical reason I can't
delete it. I can't remember, so I'm going to let the bot tell me.

types/react-bootstrap/v1/index.d.ts

@@ -1,11 +0,0 @@
-// Type definitions for react-bootstrap 1.0
-// Project: https://github.com/react-bootstrap/react-bootstrap, https://react-bootstrap.github.io
-// Definitions by: Aaron Beall <https://github.com/aaronbeall>
-// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.8
-
-/**
- * This is a stub types definition for react-bootstrap. React-bootstrap provides its own type definitions for v1.0.0,
- * so you don't need @types/react-bootstrap installed!
- */
-export {};

types/react-bootstrap/v1/tsconfig.json

@@ -1,33 +0,0 @@
-{
-    "compilerOptions": {
-        "module": "commonjs",
-        "lib": [
-            "es6",
-            "dom"
-        ],
-        "noImplicitAny": true,
-        "noImplicitThis": true,
-        "strictNullChecks": true,
-        "strictFunctionTypes": true,
-        "baseUrl": "../../",
-        "jsx": "react",
-        "typeRoots": [
-            "../../"
-        ],
-        "paths": {
-            "react-bootstrap": [
-                "react-bootstrap/v1"
-            ],
-            "react-bootstrap/*": [
-                "react-bootstrap/v1/*"
-            ]
-        },
-        "types": [],
-        "noEmit": true,
-        "forceConsistentCasingInFileNames": true,
-        "noUnusedLocals": false
-    },
-    "files": [
-        "index.d.ts"
-    ]
-}

types/react-bootstrap/v1/tslint.json

@@ -1,20 +0,0 @@
-{
-    "extends": "dtslint/dt.json",
-    "rules": {
-        "ban-types": false,
-        "callable-types": false,
-        "jsdoc-format": false,
-        "member-access": false,
-        "no-consecutive-blank-lines": false,
-        "no-duplicate-imports": false,
-        "no-padding": false,
-        "no-self-import": false,
-        "no-unnecessary-qualifier": false,
-        "semicolon": false,
-        "space-within-parens": false,
-        "strict-export-declare-modifiers": false,
-        "trim-file": false,
-        "typedef-whitespace": false,
-        "whitespace": false
-    }
-}