On remove-log-addressing branch: Further cleanup now unused code.

* subversion/libsvn_fs_fs/fs.h
  (PATH_TXN_ITEM_INDEX, PATH_INDEX): Remove.
* subversion/libsvn_fs_fs/index.h
  (svn_fs_fs__p2l_entry_t): Remove.
* subversion/libsvn_fs_fs/util.h
  (svn_fs_fs__path_txn_item_index): Remove declaration.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/remove-log-addressing@1604119 13f79535-47bb-0310-9956-ffa450edef68