convert/svn: remove dead code from entry deletion code path
It was made obsolete when multi-branches commit were split into multiple
Mercurial commits.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://www.selenic.com/mercurial/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.