You can delete a page from the Subsite Listing. Just click the Trash Can icon (you don't need to check the box).
You will get a warning if there are pages that link to your page; but you may or may not be able to view the page or change the referring link. If you get a warning that doesn't allow you to view the referring page or change the reference, you should cancel and open the page and use the delete method explained before.
You can also place a check in the box next to the page you want to delete, select "Delete Selected" from the Actions drop down menu below the list, and click "Go."
Do NOT delete the page if you get a warning. You need to clear all referring links before you delete a page or document.