As part of resolving issue (issue #3375) remove unused error container used for lock and unlock ra calls.
As part of resolving issue (issue #3375) remove unused error container
used for lock and unlock ra calls.

* subversion/libsvn_ra_serf/locks.c
  (lock_info_t): Remove error.
  (handle_lock): Pass errors via session instead of lock baton.
  (svn_ra_serf__get_lock, svn_ra_serf__lock): Stop checking for errors
    in the lock baton as they are passed via the session now.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@878165 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion