debian/git-el: remove spurious doc/git/contrib/emacs.old directory
Now that git-el's postinst uses lstat(2) and no longer confuses
a symlink to a directory for a directory, spurious emacs.old
directories in /usr/share/doc/git/contrib should be a thing of
the past. Clean up the old mess:
- if contrib/emacs.old is a symlink (from trying to install git-el
once), remove it.
- if contrib/emacs/emacs is a symlink (from trying to install git-el
twice), remove it.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>