Create a 1.8.x feature-removal branch.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x-svn_fs_info-removal@1467420 13f79535-47bb-0310-9956-ffa450edef68
On the 1.8.x-svn_fs_info-removal branch, remove trunk-only code that has been
#define'd away on 1.8.x.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x-svn_fs_info-removal@1467421 13f79535-47bb-0310-9956-ffa450edef68
Reintegrate the 1.8.x-svn_fs_info-removal branch:

 * 1.8.x-svn_fs_info-removal
   Remove an API that is #define'd away and not compiled, as well as
   fs-loader.h parts of it.
   Justification:
     Deleting dead code.  Will be released in 1.9x.
   Branch: 1.8.x-svn_fs_info-removal
   Votes:
     +1: danielsh, stsp, rhuijben


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1468160 13f79535-47bb-0310-9956-ffa450edef68