src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/removeEditorDecorations
class NotebookEditorWidget:	removeEditorDecorations(key: string): void {
		if (this._decorationRules.has(key)) {
			this._decorationRules.get(key)?.dispose();
		}

		const cellDecorations = this._decortionKeyToIds.get(key);
		this.deltaCellDecorations(cellDecorations || [], []);
	}