How to delete "Layouts"?
You can see it in the attached file
Since this is a Global Area (according to the screenshot), if this does not work, you can always go to Dashboard -> Stacks and Blocks. Then change from "View Stacks" to "View Global Areas", click on the appropriate area and select the Version History menu to delete the current version and roll back to a previous version
hope this helps!
Thanks in advance for any help with this.
have you added the layout you want to delete to a Global Area or a normal area?
If it's a global area you can roll back to a previous version withou losing the changes to the page (you will only lose the changes to the global area).
More information (specific version you're using, type of area, screenshots, etc.) would make it easier for us to help you.