Remove Sidebar from Homepage [Page.php] Help!

I’m trying to remove the sidebar from my page.php file which is my homepage [Using the default about post with the page.php configured to not show any of the actual content on the about us default page]. No where in my page.php does it make a reference to include a sidebar, so how do I exclude it from the homepage? Or better yet. I exclude the sidebar all together and make it so my main page.php area just extends to the whole width of the page?