diff --git a/src/vs/sessions/contrib/markdownPreview/browser/markdownPreview.contribution.ts b/src/vs/sessions/contrib/markdownPreview/browser/markdownPreview.contribution.ts
deleted file mode 100644
index f186d71637d..00000000000
--- a/src/vs/sessions/contrib/markdownPreview/browser/markdownPreview.contribution.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-
-import { localize } from '../../../../nls.js';
-import { ContextKeyExpr } from '../../../../platform/contextkey/common/contextkey.js';
-import { MenuId, MenuRegistry } from '../../../../platform/actions/common/actions.js';
-import { EditorContextKeys } from '../../../../editor/common/editorContextKeys.js';
-import { IsSessionsWindowContext } from '../../../../workbench/common/contextkeys.js';
-
-// Show a floating "Open Preview" button in the editor content
-// area when editing markdown or related prompt/instructions/chatagent/skill
-// language content in the sessions window.
-MenuRegistry.appendMenuItem(MenuId.EditorContent, {
-	command: {
-		id: 'markdown.showPreviewToSide',
-		title: localize('openPreview', "Open Preview"),
-	},
-	when: ContextKeyExpr.and(
-		IsSessionsWindowContext,
-		ContextKeyExpr.regex(EditorContextKeys.languageId.key, /^(markdown|prompt|instructions|chatagent|skill)$/),
-	),
-});
diff --git a/src/vs/sessions/sessions.desktop.main.ts b/src/vs/sessions/sessions.desktop.main.ts
index 9ede9e80baa..efe6d190c0d 100644
--- a/src/vs/sessions/sessions.desktop.main.ts
+++ b/src/vs/sessions/sessions.desktop.main.ts
@@ -211,7 +211,6 @@ import './contrib/gitSync/browser/gitSync.contribution.js';
 import './contrib/applyCommitsToParentRepo/browser/applyChangesToParentRepo.js';
 import './contrib/fileTreeView/browser/fileTreeView.contribution.js'; // view registration disabled; filesystem provider still needed
 import './contrib/configuration/browser/configuration.contribution.js';
-import './contrib/markdownPreview/browser/markdownPreview.contribution.js';
 
 import './contrib/terminal/browser/sessionsTerminalContribution.js';
 import './contrib/logs/browser/logs.contribution.js';