remove unreachable code

src/vs/workbench/parts/git/browser/gitActionItems.ts

-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-'use strict';
-
-import nls = require('vs/nls');
-import Keyboard = require('vs/base/browser/keyboardEvent');
-import Builder = require('vs/base/browser/builder');
-import Strings = require('vs/base/common/strings');
-import Actions = require('vs/base/common/actions');
-import InputBox = require('vs/base/browser/ui/inputbox/inputBox');
-import ActionBar = require('vs/base/browser/ui/actionbar/actionbar');
-import { IGitService } from 'vs/workbench/parts/git/common/git';
-import {IContextViewService} from 'vs/platform/contextview/browser/contextView';
-import {CommonKeybindings} from 'vs/base/common/keyCodes';
-
-var $ = Builder.$;
-
-export class CreateBranchActionItem extends ActionBar.BaseActionItem  {
-
-	private contextViewService: IContextViewService;
-	private gitService: IGitService;
-	private inputBox: InputBox.InputBox;
-
-	constructor(action: Actions.IAction, @IContextViewService contextViewService: IContextViewService, @IGitService gitService: IGitService) {
-		super(null, action);
-		this.contextViewService = contextViewService;
-		this.gitService = gitService;
-	}
-
-	public render(container:HTMLElement): void {
-		this.inputBox = new InputBox.InputBox(container, this.contextViewService, {
-			placeholder: nls.localize('createNewBranch', "Create New Branch"),
-			validationOptions: {
-				showMessage: false,
-				validation: v => this.validate(v)
-			},
-			ariaLabel: nls.localize('newBranchAriaLabel', "Type branch name")
-		});
-
-		$(this.inputBox.inputElement).on('keyup', (e: KeyboardEvent) => this.onKeyUp(e));
-
-		this._updateEnabled();
-	}
-
-	public _updateEnabled(): void {
-		if (this._action.enabled) {
-			this.inputBox.enable();
-		} else {
-			this.inputBox.disable();
-		}
-	}
-
-	public focus(): void {
-		this.inputBox.focus();
-	}
-
-	public blur(): void {
-		// no-op
-	}
-
-	private validate(value: string): InputBox.IMessage {
-		if (/^\.|\/\.|\.\.|~|\^|:|\/$|\.lock$|\.lock\/|\\|\*|^\s*$/.test(value)) {
-			return { content: nls.localize('invalidBranchName', "Invalid branch name.") };
-		}
-
-		var model = this.gitService.getModel();
-		var heads = model.getHeads();
-
-		if (heads.some(h => h.name === value)) {
-			return { content: nls.localize('dupeBranchName', "Branch name already exists.") };
-		}
-
-		return null;
-	}
-
-	private onKeyUp(e: KeyboardEvent): void {
-		var event = new Keyboard.StandardKeyboardEvent(e);
-
-		if (event.equals(CommonKeybindings.ENTER)) {
-			event.preventDefault();
-			event.stopPropagation();
-
-			if (this.validate(this.inputBox.value)) {
-				return;
-			}
-
-			var context = Strings.trim(this.inputBox.value);
-			this.actionRunner.run(this._action, context).done();
-		}
-	}
-
-	public dispose(): void {
-		this.inputBox.dispose();
-
-		super.dispose();
-	}
-}