To delete a page, go the page that you want to delete. Click on the gear in the lower left-hand corner and select MOVE TO TRASH.
This will move the page to the TRASH.
If this was done in error and you would like to restore the page, click on the gear and select REORGANIZE.
A window will appear. Scroll to the bottom of the window and find TRASH. Click on the plus to expand it.
The deleted pages will be organized by most recently deleted. Drag your page in the organization to the location in the navigation you want it to exist.