Remove vs dependency in common

Fixes #5631

src/headless/Terminal.ts

@@ -25,7 +25,7 @@ import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
 import { IBuffer } from 'common/buffer/Types';
 import { CoreTerminal } from 'common/CoreTerminal';
 import { IMarker, ITerminalOptions } from 'common/Types';
-import { Emitter, Event } from 'vs/base/common/event';
+import { Emitter, Event } from 'common/Event';
 
 export class Terminal extends CoreTerminal {
   private readonly _onBell = this._register(new Emitter<void>());