chore: Remove unused imports and enable checks for unused imports as part of build

Author: kevmoo

modules/angular2/src/core/life_cycle/life_cycle.js

@@ -1,8 +1,6 @@
-import {FIELD, print} from 'angular2/src/facade/lang';
 import {ChangeDetector} from 'angular2/change_detection';
 import {VmTurnZone} from 'angular2/src/core/zone/vm_turn_zone';
 import {ExceptionHandler} from 'angular2/src/core/exception_handler';
-import {ListWrapper} from 'angular2/src/facade/collection';
 import {isPresent} from 'angular2/src/facade/lang';
 
 export class LifeCycle {

modules/angular2/test/change_detection/change_detection_spec.js

@@ -5,7 +5,6 @@ import {List, ListWrapper, MapWrapper, StringMapWrapper} from 'angular2/src/faca
 
 import {Parser} from 'angular2/src/change_detection/parser/parser';
 import {Lexer} from 'angular2/src/change_detection/parser/lexer';
-import {arrayChangesAsString, kvChangesAsString} from './util';
 
 import {ChangeDispatcher, DynamicChangeDetector, ChangeDetectionError, ContextWithVariableBindings,
   PipeRegistry, NO_CHANGE,

modules/angular2/test/core/compiler/pipeline/proto_element_injector_builder_spec.js

@@ -1,6 +1,5 @@
 import {describe, beforeEach, it, expect, iit, ddescribe, el} from 'angular2/test_lib';
 import {isPresent, isBlank} from 'angular2/src/facade/lang';
-import {DOM} from 'angular2/src/facade/dom';
 import {List, ListWrapper, MapWrapper} from 'angular2/src/facade/collection';
 
 import {ProtoElementInjectorBuilder} from 'angular2/src/core/compiler/pipeline/proto_element_injector_builder';

modules/angular2/test/core/compiler/pipeline/proto_view_builder_spec.js

@@ -8,7 +8,6 @@ import {CompileElement} from 'angular2/src/core/compiler/pipeline/compile_elemen
 import {CompileStep} from 'angular2/src/core/compiler/pipeline/compile_step'
 import {CompileControl} from 'angular2/src/core/compiler/pipeline/compile_control';
 import {NativeShadowDomStrategy} from 'angular2/src/core/compiler/shadow_dom_strategy';
-import {DOM} from 'angular2/src/facade/dom';
 import {MapWrapper} from 'angular2/src/facade/collection';
 
 export function main() {

modules/angular2/test/core/compiler/pipeline/text_interpolation_parser_spec.js

@@ -1,7 +1,6 @@
 import {describe, beforeEach, expect, it, iit, ddescribe, el} from 'angular2/test_lib';
 import {TextInterpolationParser} from 'angular2/src/core/compiler/pipeline/text_interpolation_parser';
 import {CompilePipeline} from 'angular2/src/core/compiler/pipeline/compile_pipeline';
-import {DOM} from 'angular2/src/facade/dom';
 import {MapWrapper} from 'angular2/src/facade/collection';
 import {Lexer, Parser} from 'angular2/change_detection';
 import {CompileElement} from 'angular2/src/core/compiler/pipeline/compile_element';

modules/angular2/test/core/compiler/pipeline/view_splitter_spec.js

@@ -1,5 +1,4 @@
 import {describe, beforeEach, it, expect, iit, ddescribe, el} from 'angular2/test_lib';
-import {isPresent} from 'angular2/src/facade/lang';
 import {MapWrapper} from 'angular2/src/facade/collection';
 
 import {ViewSplitter} from 'angular2/src/core/compiler/pipeline/view_splitter';

modules/angular2/test/core/compiler/selector_spec.js

@@ -2,7 +2,6 @@ import {describe, it, expect, beforeEach, ddescribe, iit, xit, el} from 'angular
 import {SelectorMatcher} from 'angular2/src/core/compiler/selector';
 import {CssSelector} from 'angular2/src/core/compiler/selector';
 import {List, ListWrapper, MapWrapper} from 'angular2/src/facade/collection';
-import {DOM} from 'angular2/src/facade/dom';
 
 export function main() {
   describe('SelectorMatcher', () => {

modules/angular2/test/core/compiler/shadow_dom/shadow_dom_emulation_integration_spec.js

@@ -1,6 +1,5 @@
 import {describe, xit, it, expect, beforeEach, ddescribe, iit, el} from 'angular2/test_lib';
 
-import {DOM} from 'angular2/src/facade/dom';
 import {StringMapWrapper, MapWrapper, List} from 'angular2/src/facade/collection';
 import {isPresent, Type} from 'angular2/src/facade/lang';
 

modules/angular2/test/core/compiler/template_loader_spec.js

@@ -5,7 +5,6 @@ import {TemplateLoader} from 'angular2/src/core/compiler/template_loader';
 import {Template} from 'angular2/src/core/annotations/template';
 
 import {PromiseWrapper} from 'angular2/src/facade/async';
-import {Type, stringify, isPresent} from 'angular2/src/facade/lang';
 
 import {XHRMock} from 'angular2/src/mock/xhr_mock';
 

modules/angular2/test/mock/xhr_mock_spec.js

@@ -2,7 +2,6 @@ import {describe, beforeEach, it, expect, ddescribe, iit, el, IS_DARTIUM} from '
 import {XHRMock} from 'angular2/src/mock/xhr_mock';
 import {PromiseWrapper, Promise} from 'angular2/src/facade/async';
 import {isPresent} from 'angular2/src/facade/lang';
-import {ListWrapper} from 'angular2/src/facade/collection';
 
 export function main() {
   describe('XHRMock', () => {