diff --git a/src/vs/workbench/contrib/notebook/browser/notebookDiffEditor.ts b/src/vs/workbench/contrib/notebook/browser/notebookDiffEditor.ts
index 98d5c03eb73..5d838d453e4 100644
--- a/src/vs/workbench/contrib/notebook/browser/notebookDiffEditor.ts
+++ b/src/vs/workbench/contrib/notebook/browser/notebookDiffEditor.ts
@@ -28,10 +28,9 @@ import { DiffComputer } from 'vs/editor/common/diff/diffComputer';
 import { createDecoration, DECORATIONS, isChangeOrDelete, isChangeOrInsert } from 'vs/editor/browser/widget/diffEditorWidget';
 import * as editorCommon from 'vs/editor/common/editorCommon';
 import { Color } from 'vs/base/common/color';
-import { IModelDeltaDecoration, IReadonlyTextBuffer, ITextBuffer, ITextModel } from 'vs/editor/common/model';
+import { IModelDeltaDecoration, IReadonlyTextBuffer } from 'vs/editor/common/model';
 import { Range } from 'vs/editor/common/core/range';
 import { Constants } from 'vs/base/common/uint';
-import * as editorBrowser from 'vs/editor/browser/editorBrowser';
 import { defaultInsertColor, defaultRemoveColor, diffInserted, diffRemoved } from 'vs/platform/theme/common/colorRegistry';
 
 export class NotebookDiffEditor extends BaseEditor {
@@ -383,7 +382,7 @@ export class DiffEditorWidgetSideBySide extends Disposable {
 	}
 
 	protected _getOriginalEditorDecorations(lineChanges: editorCommon.ILineChange[], ignoreTrimWhitespace: boolean, renderIndicators: boolean, originalModel: IReadonlyTextBuffer): IEditorDiffDecorations {
-		const overviewZoneColor = String(this._removeColor);
+		// const overviewZoneColor = String(this._removeColor);
 
 		let result: IEditorDiffDecorations = {
 			decorations: [],
@@ -441,7 +440,7 @@ export class DiffEditorWidgetSideBySide extends Disposable {
 	}
 
 	protected _getModifiedEditorDecorations(lineChanges: editorCommon.ILineChange[], ignoreTrimWhitespace: boolean, renderIndicators: boolean, modifiedModel: IReadonlyTextBuffer): IEditorDiffDecorations {
-		const overviewZoneColor = String(this._insertColor);
+		// const overviewZoneColor = String(this._insertColor);
 
 		let result: IEditorDiffDecorations = {
 			decorations: [],
diff --git a/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts b/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts
index 1238650deca..da21dbadfec 100644
--- a/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts
+++ b/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts
@@ -3,7 +3,6 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import * as nls from 'vs/nls';
 import * as DOM from 'vs/base/browser/dom';
 import { IMouseWheelEvent } from 'vs/base/browser/mouseEvent';
 import { IListRenderer, IListVirtualDelegate, ListError } from 'vs/base/browser/ui/list/list';
@@ -26,8 +25,6 @@ import { diff, IProcessedOutput, NOTEBOOK_EDITOR_CURSOR_BOUNDARY, CellKind } fro
 import { clamp } from 'vs/base/common/numbers';
 import { SCROLLABLE_ELEMENT_PADDING_TOP } from 'vs/workbench/contrib/notebook/browser/constants';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
-import { editorBackground, foreground, focusBorder } from 'vs/platform/theme/common/colorRegistry';
-import { NotebookGutter, NotebookGutterDelegate, GutterRenderer } from 'vs/workbench/contrib/notebook/browser/view/notebookGutter';
 import { RangeMapWithWhitespace } from 'vs/workbench/contrib/notebook/browser/view/rangeMapWithWhitespace';
 
 export interface IFocusNextPreviousDelegate {
@@ -67,7 +64,6 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 
 	private readonly _focusNextPreviousDelegate: IFocusNextPreviousDelegate;
 
-	private _cellListGutter: WorkbenchList<CellViewModel>;
 	private _rangeMap: RangeMapWithWhitespace;
 
 	constructor(
@@ -168,75 +164,6 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 				focus.focusMode = CellFocusMode.Editor;
 			}
 		}));
-
-		const gutterContainer = DOM.append(container, DOM.$('.notebook-gutter'));
-
-		this._cellListGutter = instantiationService.createInstance(
-			NotebookGutter,
-			'NotebookGutter',
-			gutterContainer,
-			instantiationService.createInstance(NotebookGutterDelegate),
-			[instantiationService.createInstance(GutterRenderer, (index, size) => {
-				DOM.scheduleAtNextAnimationFrame(() => {
-					this._cellListGutter?.updateElementHeight(index, size);
-				});
-			})],
-			this.contextKeyService,
-			{
-				setRowLineHeight: false,
-				setRowHeight: false,
-				supportDynamicHeights: true,
-				horizontalScrolling: false,
-				keyboardSupport: false,
-				mouseSupport: false,
-				multipleSelectionSupport: false,
-				enableKeyboardNavigation: false,
-				additionalScrollHeight: 0,
-				transformOptimization: false,
-				styleController: (_suffix: string) => { return this; },
-				overrideStyles: {
-					listBackground: editorBackground,
-					listActiveSelectionBackground: editorBackground,
-					listActiveSelectionForeground: foreground,
-					listFocusAndSelectionBackground: editorBackground,
-					listFocusAndSelectionForeground: foreground,
-					listFocusBackground: editorBackground,
-					listFocusForeground: foreground,
-					listHoverForeground: foreground,
-					listHoverBackground: editorBackground,
-					listHoverOutline: focusBorder,
-					listFocusOutline: focusBorder,
-					listInactiveSelectionBackground: editorBackground,
-					listInactiveSelectionForeground: foreground,
-					listInactiveFocusBackground: editorBackground,
-					listInactiveFocusOutline: editorBackground,
-				},
-				accessibilityProvider: {
-					getAriaLabel() { return null; },
-					getWidgetAriaLabel() {
-						return nls.localize('notebookTreeAriaLabel', "Notebook");
-					}
-				}
-			},
-		);
-
-		this._localDisposableStore.add(this.onDidScroll(() => {
-			if (this._cellListGutter.scrollTop !== this.scrollTop) {
-				this._cellListGutter.scrollTop = this.scrollTop;
-			}
-		}));
-
-		//TODO
-
-		// this._localDisposableStore.add(this._cellListGutter.onDidScroll(() => {
-		// 	if (scrolling) {
-		// 		return;
-		// 	}
-
-		// 	if (this._cellListGutter.scrollTop !== this.scrollTop) {
-		// 		this.scrollTop = this._cellListGutter.scrollTop;
-		// 	}
-		// }));
 	}
 
 	elementAt(position: number): ICellViewModel | undefined {
@@ -461,9 +388,6 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 		}
 
 		super.splice(start, deleteCount, elements);
-
-		this._cellListGutter.splice(start, deleteCount, elements);
-
 		const selectionsLeft = [];
 		this._viewModel!.selectionHandles.forEach(handle => {
 			if (this._viewModel!.hasCell(handle)) {
@@ -671,7 +595,6 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 
 		const focused = this.getFocus();
 		this.view.updateElementHeight(index, size, focused.length ? focused[0] : null);
-		this._cellListGutter.updateElementHeight(index, size);
 	}
 
 	// override
@@ -912,15 +835,10 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 
 	updateOptions(options: IListOptions<ICellViewModel>) {
 		super.updateOptions(options);
-
-		if (options.additionalScrollHeight !== undefined) {
-			this._cellListGutter.updateOptions({ additionalScrollHeight: options.additionalScrollHeight });
-		}
 	}
 
 	layout(height?: number, width?: number): void {
 		super.layout(height, width);
-		this._cellListGutter.layout(height, width);
 	}