build: remove unnecessary excludes from tsconfig.json

The excluded files are no longer relevant.

(cherry picked from commit cb078c2)

Author: alan-agius4

tsconfig.json

@@ -35,13 +35,10 @@
   "exclude": [
     "dist/**/*",
     "dist-schema/**",
-    "goldens/**/*",
     "**/node_modules/**/*",
     "**/third_party/**/*",
-    "packages/angular_devkit/schematics_cli/blank/*-files/**/*",
     "packages/angular_devkit/schematics_cli/schematic/files/**/*",
     "packages/angular_devkit/*/test/**/*",
-    "tests/**/*",
-    ".ng-dev/**/*"
+    "tests/**/*"
   ]
 }