Fix: remove dev flag from mine page to show the new UI changes

[pankajjs]

Issue Description

The mine page has all the necessary changes by this PR #1264. The changes are stable in production but It is still under feature flag.

Expected Behavior

When you go to mine page, It should show this UI without dev flag.

Current Behavior

Right now, It shows this UI.

Reproducibility

• [x] This issue is reproducible
• [ ] This issue is not reproducible

Steps to Reproduce

1. Go to mine page
2. add dev?=true in url query to see the new changes

Severity/Priority

• [ ] Critical
• [ ] High
• [ ] Medium
• [x] Low

Additional Information

The code for old UI can be removed.

Checklist

• [x] I have read and followed the project's code of conduct.
• [x] I have searched for similar issues before creating this one.
• [x] I have provided all the necessary information to understand and reproduce the issue.
• [x] I am willing to contribute to the resolution of this issue.