docs(snackbar): remove unnecessary viewContainerRef (#1803)

Author: feloy

src/demo-app/snack-bar/snack-bar-demo.ts

@@ -1,4 +1,4 @@
-import {Component, ViewContainerRef} from '@angular/core';
+import {Component} from '@angular/core';
 import {MdSnackBar} from '@angular/material';
 
 @Component({
@@ -12,8 +12,7 @@ export class SnackBarDemo {
   action: boolean = false;
 
   constructor(
-      public snackBar: MdSnackBar,
-      public viewContainerRef: ViewContainerRef) { }
+      public snackBar: MdSnackBar) { }
 
   open() {
     this.snackBar.open(this.message, this.action && this.actionButtonLabel);

src/lib/snack-bar/README.md

@@ -26,12 +26,10 @@ The service can be injected in a component.
 })
 export class MyComponent {
 
- constructor(snackBar: MdSnackBar
-             viewContainerRef: ViewContainerRef) {}
+ constructor(snackBar: MdSnackBar) {}
 
  failedAttempt() {
-   config = new MdSnackBarConfig(this.viewContainerRef);
-   this.snackBar.open('It didn\'t quite work!', 'Try Again', config);
+   this.snackBar.open('It didn\'t quite work!', 'Try Again');
  }
 
 }