Remove old dashboards / analytics page

To remove old dashboards and analytics pages, follow these steps:

Remove DashboardPage Component:
- Delete the file: /frontend/src/pages/Dashboards/pages/Dashboard/DashboardPage.tsx
Remove DashboardsHomePage Component:
- Delete the file: /frontend/src/pages/Dashboards/pages/DashboardsHomePage/DashboardsHomePage.tsx
Update DashboardsRouter:
- Modify /frontend/src/pages/Dashboards/DashboardsRouter.tsx to remove routes related to dashboards and analytics.
```
import { Navigate, Route, Routes } from 'react-router-dom';
import HomePageV2 from '@pages/Home/HomePageV2';
```
const DashboardsRouter = () => { const { project_id } = useParams<{ project_id: string }>();

return (
} /> } />
); };

export default DashboardsRouter;
Remove DashboardOverview Component:
- Delete the file: /frontend/src/pages/Graphing/DashboardOverview.tsx
Update SQL Script:
- Modify /scripts/migrations/set_dashboard_is_default.sql to remove references to old dashboards.
```
UPDATE dashboards
SET is_default = false
WHERE name IN ('Home', 'Web Vitals', 'Frontend Observability');
```
Remove Unused Components and Hooks:
- Delete any unused components and hooks related to dashboards and analytics in the /frontend/src/pages/Dashboards and /frontend/src/pages/Graphing directories.

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