Cruft cleanup in libsvn_fs_base.
Cruft cleanup in libsvn_fs_base.

* subversion/libsvn_fs_base/dag.c
  (copy_node_revision):  remove useless func, it's a vestige of a
                         long-deleted node-caching subsystem.
  (set_entry):   we don't need to dup the noderev.  really.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion