code: def removeMigrationRequest(self, migration_rqst):
          
          conn = self.dbi.connection()
          try:
              tran = conn.begin()
              self.mgrremove.execute(conn, migration_rqst)
              tran.commit()
          except dbsException as he:
              if conn: conn.close()
              raise
          except Exception as ex:
              if conn: conn.close()
              raise
          if conn: conn.close()
docs: Method to remove pending or failed migration request from the queue.