src/vs/workbench/api/browser/mainThreadComments.ts/MainThreadComments/$deleteCommentThread
class MainThreadComments:	$deleteCommentThread(handle: number, commentThreadHandle: number) {
		let provider = this._commentControllers.get(handle);

		if (!provider) {
			return;
		}

		return provider.deleteCommentThread(commentThreadHandle);
	}