[krbdev.mit.edu #2106] bug in krb5_cc_remove_cred API?

["Jeffrey Altman [Kermit Project]" via RT]

One could easily argue that if the desire is to leave a function
unimplemented that the best way to indicate that would be to
surround the function declaration in the header with

   #ifdef KRB5_UNIMPLEMENTED_API
   #endif