Avoid using import x = require('...')

Don't use this import form in places where it is not needed. This prevents us from correctly detecting duplicate imports

src/vs/workbench/api/node/extHostTerminalService.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 'use strict';
 
-import vscode = require('vscode');
+import * as vscode from 'vscode';
 import { Event, Emitter } from 'vs/base/common/event';
 import { ExtHostTerminalServiceShape, MainContext, MainThreadTerminalServiceShape, IMainContext } from './extHost.protocol';