refactor(Compiler): misc cleanup

modules/@angular/core/src/linker/component_factory.ts

@@ -13,7 +13,6 @@ import {Type} from '../type';
 
 import {ElementRef} from './element_ref';
 import {AppView} from './view';
-import {ViewContainer} from './view_container';
 import {ViewRef} from './view_ref';
 import {ViewUtils} from './view_utils';
 
@@ -86,11 +85,6 @@ export class ComponentRef_<C> extends ComponentRef<C> {
   onDestroy(callback: Function): void { this.hostView.onDestroy(callback); }
 }
 
-/**
- * @experimental
- */
-const EMPTY_CONTEXT = new Object();
-
 /**
  * @stable
  */

modules/@angular/core/src/linker/template_ref.ts

@@ -8,7 +8,6 @@
 
 import {ElementRef} from './element_ref';
 import {AppView} from './view';
-import {ViewContainer} from './view_container';
 import {EmbeddedViewRef} from './view_ref';
 
 

modules/@angular/core/src/linker/view.ts

@@ -11,7 +11,7 @@ import {ChangeDetectorRef, ChangeDetectorStatus} from '../change_detection/chang
 import {Injector, THROW_IF_NOT_FOUND} from '../di/injector';
 import {isPresent} from '../facade/lang';
 import {WtfScopeFn, wtfCreateScope, wtfLeave} from '../profile/profile';
-import {DirectRenderer, RenderComponentType, RenderDebugInfo, Renderer} from '../render/api';
+import {DirectRenderer, RenderComponentType, Renderer} from '../render/api';
 
 import {AnimationViewContext} from './animation_view_context';
 import {ComponentRef} from './component_factory';

modules/@angular/core/src/linker/view_container.ts

@@ -7,10 +7,8 @@
  */
 
 import {Injector} from '../di/injector';
-import {isPresent} from '../facade/lang';
 
 import {ElementRef} from './element_ref';
-import {QueryList} from './query_list';
 import {AppView} from './view';
 import {ViewContainerRef_} from './view_container_ref';
 import {ViewType} from './view_type';

modules/@angular/core/src/linker/view_utils.ts

@@ -8,14 +8,13 @@
 
 import {AnimationQueue} from '../animation/animation_queue';
 import {SimpleChange, devModeEqual} from '../change_detection/change_detection';
-import {Inject, Injectable} from '../di';
+import {Injectable} from '../di';
 import {isPresent, looseIdentical} from '../facade/lang';
 import {ViewEncapsulation} from '../metadata/view';
 import {RenderComponentType, RenderDebugInfo, Renderer, RootRenderer} from '../render/api';
 import {Sanitizer, SecurityContext} from '../security';
 import {Type} from '../type';
 import {VERSION} from '../version';
-import {NgZone} from '../zone/ng_zone';
 
 import {ComponentFactory} from './component_factory';
 import {ExpressionChangedAfterItHasBeenCheckedError} from './errors';
@@ -24,7 +23,6 @@ import {AppView} from './view';
 @Injectable()
 export class ViewUtils {
   sanitizer: Sanitizer;
-  private _nextCompTypeId: number = 0;
 
   constructor(
       private _renderer: RootRenderer, sanitizer: Sanitizer,