On the fsfs-format7 branch: lose parameter introduced by a copy-n-pasto.

* subversion/include/private/svn_packed_data.h
  (svn_packed__get_int): drop unused parameter

* subversion/libsvn_subr/packed_data.c
  (svn_packed__get_int): update signature


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1489817 13f79535-47bb-0310-9956-ffa450edef68