Do you want to remove the sidebar from your custom homepage or another static page? Here's how to make that page full-width!
The first thing you'll need is a page to work with. Once you have one created, open up the page editor.
You'll find Page Attributes > Templates > Full Width Page in the right-hand sidebar. Click Full Width Page.
The Default Template option in that same drop-down menu will give you a page with a sidebar.
3. That's it! Now you have a full-width page with no sidebar in sight!