code: def remove_vrf(self, auth, spec):
          
  
          self._logger.debug("remove_vrf called; spec: %s" % unicode(spec))
  
          # get list of VRFs to remove before removing them
          vrfs = self.list_vrf(auth, spec)
  
          # remove prefixes in VRFs
          for vrf in vrfs:
              v4spec = {
                  'prefix': '0.0.0.0/0',
                  'vrf_id': vrf['id']
              }
              v6spec = {
                  'prefix': '::/0',
                  'vrf_id': vrf['id']
              }
              self.remove_prefix(auth, spec = v4spec, recursive = True)
              self.remove_prefix(auth, spec = v6spec, recursive = True)
  
          where, params = self._expand_vrf_spec(spec)
          sql = "DELETE FROM ip_net_vrf WHERE %s" % where
          self._execute(sql, params)
  
          # write to audit table
          for v in vrfs:
              audit_params = {
                  'vrf_id': v['id'],
                  'vrf_rt': v['rt'],
                  'vrf_name': v['name'],
                  'username': auth.username,
                  'authenticated_as': auth.authenticated_as,
                  'full_name': auth.full_name,
                  'authoritative_source': auth.authoritative_source,
                  'description': 'Removed vrf %s' % v['rt']
              }
              sql, params = self._sql_expand_insert(audit_params)
              self._execute('INSERT INTO ip_net_log %s' % sql, params)
docs: Remove a VRF.
  
              * `auth` [BaseAuth]
                  AAA options.
              * `spec` [vrf_spec]
                  A VRF specification.
  
              Remove VRF matching the `spec` argument.
  
              This is the documentation of the internal backend function. It's
              exposed over XML-RPC, please also see the XML-RPC documentation for
              :py:func:`nipap.xmlrpc.NipapXMLRPC.remove_vrf` for full
              understanding.