src/vs/workbench/api/browser/mainThreadNotebook.ts/MainThreadNotebooks/$unregisterNotebookCellStatusBarItemProvider
class MainThreadNotebooks:	async $unregisterNotebookCellStatusBarItemProvider(handle: number, eventHandle: number | undefined): Promise<void> {
		const unregisterThing = (handle: number) => {
			const entry = this._notebookCellStatusBarRegistrations.get(handle);
			if (entry) {
				this._notebookCellStatusBarRegistrations.get(handle)?.dispose();
				this._notebookCellStatusBarRegistrations.delete(handle);
			}
		};
		unregisterThing(handle);
		if (typeof eventHandle === 'number') {
			unregisterThing(eventHandle);
		}
	}