Revert "Enable the notebook renderer on web"

This reverts commit 7d9dcac.

Author: mjbvz

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

@@ -70,6 +70,7 @@ import { ToolBar } from 'vs/base/browser/ui/toolbar/toolbar';
 import { IKeybindingService } from 'vs/platform/keybinding/common/keybinding';
 import { ITASExperimentService } from 'vs/workbench/services/experiment/common/experimentService';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
+import { isWeb } from 'vs/base/common/platform';
 import { mark } from 'vs/workbench/contrib/notebook/common/notebookPerformance';
 import { readFontInfo } from 'vs/editor/browser/config/configuration';
 import { INotebookKernelService } from 'vs/workbench/contrib/notebook/common/notebookKernelService';
@@ -327,7 +328,7 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditor
 		super();
 		this.isEmbedded = creationOptions.isEmbedded || false;
 
-		this.useRenderer = !!this.configurationService.getValue<boolean>(ExperimentalUseMarkdownRenderer) && !accessibilityService.isScreenReaderOptimized();
+		this.useRenderer = !isWeb && !!this.configurationService.getValue<boolean>(ExperimentalUseMarkdownRenderer) && !accessibilityService.isScreenReaderOptimized();
 
 		this._overlayContainer = document.createElement('div');
 		this.scopedContextKeyService = contextKeyService.createScoped(this._overlayContainer);