How can I remove my any specific server and its complete data permanently from gametracker ?
Actually I want to delete all players scores and rank of server, and add server again for fresh start.

This is why we have a Guides and FAQs section.
(also linked in my posting 'signature' below)

You can delete all player stats by simply using the server management page.
Click the 'Manage' button to get to the page.

You can also delete the server using the same page.

Be aware: there is no 'Undo' feature. When it's gone, it's gone.