chore(tools): remove rtts from the repo.

Closes #4107

modules/angular2/package.json

@@ -10,7 +10,6 @@
   "dependencies": {
     "traceur": "<%= packageJson.dependencies.traceur %>",
     "reflect-metadata": "<%= packageJson.dependencies['reflect-metadata'] %>",
-    "rtts_assert": "<%= packageJson.version %>",
     "rx": "<%= packageJson.dependencies['rx'] %>",
     "zone.js": "<%= packageJson.dependencies['zone.js'] %>"
   },

modules/angular2/src/test_lib/test_lib.ts

@@ -392,14 +392,12 @@ export class SpyObject {
     return object;
   }
 
-  rttsAssert(value) { return true; }
-
   _createGuinnessCompatibleSpy(name): GuinessCompatibleSpy {
     var newSpy: GuinessCompatibleSpy = <any>jasmine.createSpy(name);
     newSpy.andCallFake = <any>newSpy.and.callFake;
     newSpy.andReturn = <any>newSpy.and.returnValue;
     newSpy.reset = <any>newSpy.calls.reset;
-    // return null by default to satisfy our rtts asserts
+    // revisit return null here (previously needed for rtts_assert).
     newSpy.and.returnValue(null);
     return newSpy;
   }

modules/angular2/test/test_lib/test_lib_spec.ts

@@ -125,8 +125,7 @@ export function main() {
          () => { expect(() => spyObj.someFunc()).not.toThrow(); });
 
       it('should create a default spy that does not fail for numbers', () => {
-        // Need to return null instead of undefined so that rtts assert does
-        // not fail...
+        // Previously needed for rtts_assert. Revisit this behavior.
         expect(spyObj.someFunc()).toBe(null);
       });
     });