mutt: remove offlineimap.py
mutt: remove offlineimap.py

Which I forgot to remove previoulsly on
moving to isync/mbsync.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent