Follow-up to r1634880: Cleanup unused revision properties caching code.

* subversion/libsvn_fs_fs/caching.c
  (read_config): Remove CACHE_REVPROPS output parameter - it was always 
   initalized to FALSE.
  (svn_fs_fs__initialize_caches): Remove revprop cache initialization.

* subversion/libsvn_fs_fs/fs.h
  (fs_fs_data_t): Remove REVPROP_CACHE member.

* subversion/libsvn_fs_fs/revprops.c
  (has_revprop_cache): Remove unused function.
  (switch_to_new_revprop): Remove unused argument BUMP_GENERATION.
  (parse_revprop, svn_fs_fs__set_revision_proplist): Remove unused code.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1639358 13f79535-47bb-0310-9956-ffa450edef68