Did someone tell you to do that to your .htaccess file, because I'm not sure what you're asking. If you are having an issue with mod_rewrite then being able to see the contents of your .htaccess file and have a description of the problem helps.
Well if you did that you'd be left with just the following which wouldn't do a lot: Options +FollowSymLinks RewriteEngine On Code (markup): It means remove every occurrence of.