BOOLEAN
KeRemoveQueueApc(
  IN  PKAPC Apc
  );

Routine Description:

    This function removes an APC object from an APC queue. If the APC object
    is not in an APC queue, then no operation is performed. Otherwise the
    APC object is removed from its current queue and its inserted state is
    set FALSE.

Arguments:

    Apc - Supplies a pointer to a control object of type APC.

Return Value:

    If the APC object is not in an APC queue, then a value of FALSE is returned.
    Otherwise a value of TRUE is returned.