Remove duplicate enter handler (microsoft#160339)

Remove duplicate enter handler, fix microsoft#160191

Author: roblourens

src/vs/workbench/contrib/debug/browser/debugActionViewItems.ts

@@ -99,9 +99,6 @@ export class StartDebugActionViewItem extends BaseActionViewItem {
 
 		this.toDispose.push(dom.addDisposableListener(this.start, dom.EventType.KEY_DOWN, (e: KeyboardEvent) => {
 			const event = new StandardKeyboardEvent(e);
-			if (event.equals(KeyCode.Enter) && this.debugService.state !== State.Initializing) {
-				this.actionRunner.run(this.action, this.context);
-			}
 			if (event.equals(KeyCode.RightArrow)) {
 				this.start.tabIndex = -1;
 				this.selectBox.focus();