On the fsx-id branch: Remove POOL member from svn_fs_id_t struct.
It hasn't and won't be used.

* subversion/libsvn_fs_x/id.c
  (fs_x__id_t): Remove POOL.
  (svn_fs_x__id_txn_create_root,
   svn_fs_x__id_create_root,
   svn_fs_x__id_txn_create,
   svn_fs_x__id_create,
   svn_fs_x__id_copy,
   id_parse,
   svn_fs_x__id_deserialize): No need to initialize the POOL member anymore.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsx-id@1646802 13f79535-47bb-0310-9956-ffa450edef68