Revert internal files that didn't get pulled internally first

See all the packager files in this commit:
f83675d191 (diff-7b5603771e245e5b0cd7223277db3db4)

cc @foghina

packager/react-packager/src/Activity/__tests__/Activity-test.js

@@ -9,9 +9,6 @@
 'use strict';
 
 jest.autoMockOff();
-jest.setMock('chalk', {
-  dim: function(s) { return s; },
-});
 
 describe('Activity', () => {
   const origConsoleLog = console.log;

packager/react-packager/src/DependencyResolver/DependencyGraph/__tests__/DependencyGraph-test.js

@@ -23,8 +23,7 @@ jest
   .dontMock('../../AssetModule')
   .dontMock('../../Module')
   .dontMock('../../Package')
-  .dontMock('../../ModuleCache')
-  .setMock('chalk', { dim: function(s) { return s; } });
+  .dontMock('../../ModuleCache');
 
 const Promise = require('promise');
 

packager/react-packager/src/Server/__tests__/Server-test.js

@@ -14,8 +14,7 @@ jest.setMock('worker-farm', function() { return () => {}; })
     .dontMock('url')
     .setMock('timers', { setImmediate: (fn) => setTimeout(fn, 0) })
     .setMock('uglify-js')
-    .dontMock('../')
-    .setMock('chalk', { dim: function(s) { return s; } });
+    .dontMock('../');
 
 const Promise = require('promise');