Remove a few more unused queries.
Remove a few more unused queries.

* subversion/libsvn_wc/wc-queries.sql
  (STMT_DELETE_ALL_WORKING_NODES,
   STMT_DELETE_NODES,
   STMT_SELECT_NOT_PRESENT,
   STMT_UPDATE_CHECKSUM): Remove queries.

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