remove_call_out() - remove a pending call_out
int remove_call_out( string fun ); int remove_call_out();
In the first form this function removes the next pending call out for function 'fun' in the current object. The return value is the time remaining before the callback is to be called, or -1 if there were no call out pending to this function. In the second form all pending call outs for the current object will be removed. In this case the return value is always 0.