src/vs/platform/files/node/diskFileSystemProviderServer.ts/AbstractDiskFileSystemProviderChannel/unwatch
class AbstractDiskFileSystemProviderChannel:	private async unwatch(sessionId: string, req: number): Promise<void> {
		const id = sessionId + req;
		const disposable = this.watchRequests.get(id);
		if (disposable) {
			dispose(disposable);
			this.watchRequests.delete(id);
		}
	}