Clean up mobile shell test warning

Author: pallyoung

packages/web/src/shells/mobile-shell/index.test.tsx

@@ -807,7 +807,7 @@ describe("MobileShell Phase 2 workspace", () => {
 
       return undefined;
     });
-    const { store } = renderMobileShell({
+    renderMobileShell({
       initialEntry: "/workspace",
       sessions: [],
       paneLayout: {