docs: def remove_local_exception_handler(handler, coro=None):
      """remove a callback from the list of exception handlers for a coroutine
  
      :param handler: the callback to remove
      :type handler: function
      :param coro: the coroutine for which to remove the local handler
      :type coro: greenlet
  
      :returns: bool, whether the handler was found (and therefore removed)
      """
      if coro is None:
          coro = compat.getcurrent()
  
      for i, cb in enumerate(state.local_exception_handlers.get(coro, [])):
          cb = cb()
          if cb is not None and cb is handler:
              state.local_exception_handlers[coro].pop(i)
              log.info("removing a coroutine local exception handler")
              return True
      return False