Revert "add Event.debouncedListener as replacement for debounce, m…

…icrosoft#123487"

This reverts commit f41273c.

src/vs/base/common/event.ts

@@ -145,45 +145,16 @@ export namespace Event {
 		return emitter.event;
 	}
 
-	export function debouncedListener<T, O = T>(event: Event<T>, listener: (data: O) => any, merge: (last: O | undefined, event: T) => O, delay: number = 100, leading: boolean = false): IDisposable {
-
-		let output: O | undefined = undefined;
-		let handle: any = undefined;
-		let numDebouncedCalls = 0;
-
-		return event(cur => {
-			numDebouncedCalls++;
-			output = merge(output, cur);
-
-			if (leading && !handle) {
-				listener(output);
-				output = undefined;
-			}
-
-			clearTimeout(handle);
-			handle = setTimeout(() => {
-				const _output = output;
-				output = undefined;
-				handle = undefined;
-				if (!leading || numDebouncedCalls > 1) {
-					listener(_output!);
-				}
-
-				numDebouncedCalls = 0;
-			}, delay);
-		});
-	}
-
 	/**
-	 * @deprecated this leaks memory, {@link debouncedListener} or {@link DebounceEmitter} instead
+	 * @deprecated DO NOT use, this leaks memory
 	 */
 	export function debounce<T>(event: Event<T>, merge: (last: T | undefined, event: T) => T, delay?: number, leading?: boolean, leakWarningThreshold?: number, disposable?: DisposableStore): Event<T>;
 	/**
-	 * @deprecated this leaks memory, {@link debouncedListener} or {@link DebounceEmitter} instead
+	 * @deprecated DO NOT use, this leaks memory
 	 */
 	export function debounce<I, O>(event: Event<I>, merge: (last: O | undefined, event: I) => O, delay?: number, leading?: boolean, leakWarningThreshold?: number, disposable?: DisposableStore): Event<O>;
 	/**
-	 * @deprecated this leaks memory, {@link debouncedListener} or {@link DebounceEmitter} instead
+	 * @deprecated DO NOT use, this leaks memory
 	 */
 	export function debounce<I, O>(event: Event<I>, merge: (last: O | undefined, event: I) => O, delay: number = 100, leading = false, leakWarningThreshold?: number, disposable?: DisposableStore): Event<O> {
 

src/vs/workbench/contrib/notebook/browser/notebook.contribution.ts

@@ -507,12 +507,11 @@ class NotebookEditorManager implements IWorkbenchContribution {
 
 		// OPEN notebook editor for models that have turned dirty without being visible in an editor
 		type E = IResolvedNotebookEditorModel;
-		this._disposables.add(Event.debouncedListener<E, E[]>(
+		this._disposables.add(Event.debounce<E, E[]>(
 			this._notebookEditorModelService.onDidChangeDirty,
-			this._openMissingDirtyNotebookEditors.bind(this),
 			(last, current) => !last ? [current] : [...last, current],
 			100
-		));
+		)(this._openMissingDirtyNotebookEditors, this));
 
 		// CLOSE notebook editor for models that have no more serializer
 		this._disposables.add(notebookService.onWillRemoveViewType(e => {