build: consolidate tsc to ease migration to @types/ based typings delivery

I actually tried to use @types/* directly but came across several issues which prevented me
from switching over:
- https://github.com/Microsoft/TypeScript/issues/8715
- https://github.com/Microsoft/TypeScript/issues/8723

modules/angular1_router/tsd.json

@@ -1,12 +0,0 @@
-{
-  "version": "v4",
-  "repo": "DefinitelyTyped/DefinitelyTyped",
-  "ref": "master",
-  "path": "typings",
-  "bundle": "typings/tsd.d.ts",
-  "installed": {
-    "angularjs/angular.d.ts": {
-      "commit": "6eebd5e90a1cbd6b47b0705ba72dbcd5baf846f3"
-    }
-  }
-}