Remove custom testing code, as we'll soon switch to spillbufs.
Remove custom testing code, as we'll soon switch to spillbufs.

* subversion/libsvn_ra_serf/util.c:
  (PBTEST_*): removed
  (...): remove all references to the testing mechanism


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1302567 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion