<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def removeChild(self, child_id):
 """Remove a child from current workitem :param child_id: the child workitem id/number (integer or equivalent string) """


        self.log.debug("Try to remove a child <Workitem %s> from current "
                       "<Workitem %s>",
                       child_id,
                       self)
        self._removeChildren([child_id])
        self.log.info("Successfully remove a child <Workitem %s> from "
                      "current <Workitem %s>",
                      child_id,
                      self)