msgchk.c: Remove UUCP tests; unused since `#ifdef MF'.
msgchk.c: Remove UUCP tests; unused since `#ifdef MF'.

The values UUCPOLD et al are never set so don't bother testing for them.
They haven't be possible in git's history.  They were guarded in the
past by `#ifdef MF';  that stood for `mail filter'.

mcr/nmh,mcr/nmh