src/vs/workbench/api/browser/mainThreadNotebookKernels.ts/MainThreadNotebookKernels/$removeKernelSourceActionProvider
class MainThreadNotebookKernels:	$removeKernelSourceActionProvider(handle: number): void {
		const tuple = this._kernelSourceActionProviders.get(handle);
		if (tuple) {
			tuple[1].dispose();
			this._kernelSourceActionProviders.delete(handle);
		}
	}