Remove pkg/keyctl/keyID.ID
Remove pkg/keyctl/keyID.ID

It is never called inside the package, and the type is never made
available to external callers, so no other callers can exist.

Signed-off-by: Miloslav Trmač <9c008e38982a5397deb855345fb164f0558459ae@redhat.com>

containers/image,containers/image