Shape Keys Causing Trouble

During the process of modeling a bust, I appended in a different head so that I could use that head’s ear.

I isolated the ear and joined to the new mesh, and continued to model…

When I finished modeling I realized that the ear had brought shape keys to my bust, and whenever I manipulate them or try to delete them, they distort my mesh.

I can’t find any way to remove the shape keys.

I attached the .blend file here.

orc.blend (829 KB)

See this demo