remove unused list hack

src/vs/base/browser/ui/list/list.ts

@@ -12,7 +12,6 @@ export interface IListVirtualDelegate<T> {
 	getTemplateId(element: T): string;
 	hasDynamicHeight?(element: T): boolean;
 	setDynamicHeight?(element: T, height: number): void;
-	getDynamicHeight?(element: T): number;
 }
 
 export interface IListRenderer<T, TTemplateData> {

src/vs/base/browser/ui/list/listView.ts

@@ -1172,6 +1172,7 @@ export class ListView<T> implements ISpliceable<T>, IDisposable {
 
 		if (this.virtualDelegate.hasDynamicHeight) {
 			if (!this.virtualDelegate.hasDynamicHeight(item.element)) {
+				// if the item doesn't have dynamic height, don't check its height again
 				return 0;
 			}
 		} else {

src/vs/workbench/contrib/notebook/browser/renderers/cellRenderer.ts

@@ -40,10 +40,6 @@ export class NotebookCellListDelegate implements IListVirtualDelegate<CellViewMo
 		return element.hasDynamicHeight();
 	}
 
-	getDynamicHeight(element: CellViewModel) {
-		return element.dynamicHeight || 0;
-	}
-
 	getTemplateId(element: CellViewModel): string {
 		if (element.cellType === 'markdown') {
 			return MarkdownCellRenderer.TEMPLATE_ID;