Remove unneeded variables resulting from r1348847.
Remove unneeded variables resulting from r1348847.

* subversion/libsvn_repos/replay.c
  (path_driver_cb_baton): Remove base_path_len.
  (is_within_base_path): Remove base_len param.
  (path_driver_cb_func): Update callers.
  (svn_repos_replay2): Don't calculate or store the base path.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion