Core: Kill off Host_UpdateLogDisplay()

This was actually never used as far as I can tell. There was no wx event handling done whatsoever for the global ID, So this is basically a dead function.

Source/Core/DolphinWX/Debugger/CodeWindow.cpp

@@ -285,7 +285,6 @@ void CCodeWindow::SingleStep()
 		// need a short wait here
 		JumpToAddress(PC);
 		Update();
-		Host_UpdateLogDisplay();
 	}
 }