Engineering - adopt l10n for git-base/git/github extesions (#164566)

Co-authored-by: Tyler James Leonhardt <me@tylerleonhardt.com>

extensions/github/package.json

@@ -134,8 +134,7 @@
   },
   "dependencies": {
     "@octokit/rest": "19.0.4",
-    "tunnel": "^0.0.6",
-    "vscode-nls": "^5.2.0"
+    "tunnel": "^0.0.6"
   },
   "devDependencies": {
     "@types/node": "16.x"