Item11267: $Rev filtering too aggressive

This code can go away once svn is gone.  But for now, don't filter
Dependency.pm.   It uses $Rev strings in comments, that don't need
any filtering.

git-svn-id: http://svn.foswiki.org/trunk/BuildContrib@16391 0b4bb1d4-4e5a-0410-9cc4-b2b747904278