docs: remove @zeit/ng-deploy from deploy suggestions

This package seems not to be maintained anymore. Hence, it shouldn't be suggested with ng deploy.

Author: fmalcher

packages/angular/cli/commands/deploy-impl.ts

@@ -19,7 +19,6 @@ favorite platform.
 For example:
   ng add @angular/fire
   ng add @azure/ng-deploy
-  ng add @zeit/ng-deploy
 
 Find more packages on npm https://www.npmjs.com/search?q=ng%20deploy
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