Remove obsolete code from FSFS hotcopy.
There are no separate index files anymore.

* subversion/libsvn_fs_fs/hotcopy.c
  (hotcopy_remove_files): Drop REMOVE_INDEXES parameter and don't try
                          to delete those n/a files anymore.
  (hotcopy_remove_rev_files,
   hotcopy_remove_revprop_files): Update caller.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1628738 13f79535-47bb-0310-9956-ffa450edef68