event/SignalMonitor: remove unused function SignalMonitorGetEventLoop

src/event/SignalMonitor.cxx

@@ -170,12 +170,6 @@ SignalMonitorFinish()
 	monitor.Destruct();
 }
 
-EventLoop &
-SignalMonitorGetEventLoop()
-{
-	return monitor->GetEventLoop();
-}
-
 void
 SignalMonitorRegister(int signo, SignalHandler handler)
 {

src/event/SignalMonitor.hxx

@@ -43,13 +43,6 @@ void
 SignalMonitorFinish();
 
 /**
- * Obtain a reference to the #EventLoop that was passed to
- * SignalMonitorInit().
- */
-EventLoop &
-SignalMonitorGetEventLoop();
-
-/**
  * Register a handler for the specified signal.  The handler will be
  * invoked in a safe context.
  */