Removed a superfluous function in proof.mli. Preparing for incoming changes of the handling of unfocusing errors.
Removed a superfluous function in proof.mli. Preparing for incoming
changes of the handling of unfocusing errors.

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@15010 85f007b7-540e-0410-9357-904b9bb8a0f7

maximedenes/native-coq,maximedenes/native-coq,maximedenes/native-coq