Do I need ?sef_rewrite=1 in the htaccess

I've just move a site live and implemented a bunch of redirects. I see that when an old URL is entered, it goes to the correct page but adds ?sef_rewrite=1. I see this in the htaccess file as

RewriteRule . index.php?sef_rewrite=1 [L,QSA]

Is this really needed? I'd prefer that this not be part of the url that is displayed.


Anyone find a solution for this?