Follow-up to r1592723: Remove an unused variable.
Follow-up to r1592723: Remove an unused variable.

* subversion/svnadmin/svnadmin.c
  (subcommand_delrevprop): As above.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1593652 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion