revert

Author: sllethe

src/lib/sticky-header/sticky-header.ts

@@ -5,8 +5,9 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {Component, Directive, Input, Output,
-  OnDestroy, AfterViewInit, ElementRef, Injectable, Optional} from '@angular/core';
+import {Directive, Input,
+  OnDestroy, AfterViewInit, ElementRef, Optional} from '@angular/core';
+import {Platform} from '../core/platform';
 import {Scrollable} from '../core/overlay/scroll/scrollable';
 import {extendObject} from '../core/util/object-extend';
 import {Subscription} from 'rxjs/Subscription';