How do I simply REMOVE/CANCEL/ELIMINATE a page and/or a link ?

To eliminate a link, simply click "Edit page" and delete the link text. If you want to remove the link without removing the text, click "Edit page" and then right click on the link. This should give you the option to "Remove link" which will remove the link and leave the text in place.

To delete a page, click on the "Show all pages" in the "Wiki Information" section at the bottom of any page, and click the "delete" button next to the page you want to remove. Note that deleting a page is permanent and undoable. You cannot revert and cancel a deletion.