chore(commands): override ng destroy

It's common for users to try and do `ng destroy component name` and have
it only partially work.

Since we don't support the command, it's better to not have it do any
partial operations.

packages/angular-cli/addon/index.js

@@ -22,6 +22,7 @@ module.exports = {
       'serve': require('../commands/serve').default,
       'new': require('../commands/new').default,
       'generate': require('../commands/generate').default,
+      'destroy': require('../commands/destroy').default,
       'init': require('../commands/init').default,
       'test': require('../commands/test').default,
       'e2e': require('../commands/e2e').default,

packages/angular-cli/commands/destroy.ts

@@ -0,0 +1,20 @@
+const Command = require('ember-cli/lib/models/command');
+const SilentError = require('silent-error');
+
+
+const DestroyCommand = Command.extend({
+  name: 'destroy',
+  aliases: ['d'],
+  works: 'insideProject',
+
+  anonymousOptions: [
+    '<blueprint>'
+  ],
+
+  run: function() {
+    return Promise.reject(new SilentError('The destroy command is not supported by Angular-CLI.'));
+  }
+});
+
+export default DestroyCommand;
+DestroyCommand.overrideCore = true;

packages/angular-cli/commands/help.ts

@@ -7,6 +7,7 @@ const lookupCommand = require('ember-cli/lib/cli/lookup-command');
 
 const commandsToIgnore = [
   'easter-egg',
+  'destroy',
   'github-pages-deploy' // errors because there is no base github-pages command
 ];