Is there a way to remove tabs inside panels? This is a simple question, i know that there are many modules who can alter tab like tab tamer.

But i would like to avoid to install another module in my site because he's already slow and my server he's limited, it's why i'm asking this question.

I alter the user template profile, so i just want to remove the tabs : view and edit, i didn't find any setting to do that but maybe i missed something?
From memory, I believe the answer is no, because the tabs are rendered outside of the area that Panels is responsible for.

If you use Panels everywhere, then you can simply leave the tabs out however, "In panels". If you don't, the rendering is probably happening in page.tpl.php instead.