fix(typing): Remove re-export of the Promise built-in type.

Instead, ts2dart can add the 'dart:async' import whenever
Promise is used.

Fixes #6468

modules/angular2/test/compiler/change_detector_compiler_spec.ts

@@ -16,7 +16,6 @@ import {provide} from 'angular2/src/core/di';
 
 import {CONST_EXPR, stringify, IS_DART} from 'angular2/src/facade/lang';
 import {MapWrapper} from 'angular2/src/facade/collection';
-import {Promise} from 'angular2/src/facade/async';
 
 import {ChangeDetectionCompiler} from 'angular2/src/compiler/change_detector_compiler';
 

modules/angular2/test/compiler/eval_module.ts

@@ -1,4 +1,4 @@
-import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
+import {PromiseWrapper} from 'angular2/src/facade/async';
 import {isPresent, global, StringWrapper} from 'angular2/src/facade/lang';
 
 var evalCounter = 0;

modules/angular2/test/compiler/style_compiler_spec.ts

@@ -25,7 +25,7 @@ import {
   isArray,
   IS_DART
 } from 'angular2/src/facade/lang';
-import {PromiseWrapper, Promise} from 'angular2/src/facade/async';
+import {PromiseWrapper} from 'angular2/src/facade/async';
 import {evalModule} from './eval_module';
 import {StyleCompiler} from 'angular2/src/compiler/style_compiler';
 import {

modules/angular2/test/compiler/template_compiler_spec.ts

@@ -13,7 +13,7 @@ import {
   beforeEachProviders
 } from 'angular2/testing_internal';
 
-import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
+import {PromiseWrapper} from 'angular2/src/facade/async';
 import {Type, isPresent, isBlank, stringify, isString, IS_DART} from 'angular2/src/facade/lang';
 import {
   MapWrapper,

modules/angular2/test/compiler/xhr_mock_spec.ts

@@ -10,7 +10,7 @@ import {
   it,
 } from 'angular2/testing_internal';
 import {MockXHR} from 'angular2/src/compiler/xhr_mock';
-import {PromiseWrapper, Promise} from 'angular2/src/facade/async';
+import {PromiseWrapper} from 'angular2/src/facade/async';
 import {isPresent} from 'angular2/src/facade/lang';
 
 export function main() {