Revert "Add debounce to config change event in tasks"

This reverts commit 3404da91.

The detail was confusing and made it look like the tasks weren't updating.

src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts

@@ -295,9 +295,7 @@ export abstract class AbstractTaskService extends Disposable implements ITaskSer
 			this.updateSetup(folderSetup);
 			this.updateWorkspaceTasks();
 		}));
-		this._register(Event.debounce(this.configurationService.onDidChangeConfiguration, () => {
-			return;
-		}, 1000)(() => {
+		this._register(this.configurationService.onDidChangeConfiguration(() => {
 			if (!this._taskSystem && !this._workspaceTasksPromise) {
 				return;
 			}