Remove redundant "== true" code

If it can be compared to a boolean, it can be evaluated as one in-place.

platform/windows/os_windows.cpp

@@ -2737,7 +2737,7 @@ void OS_Windows::run() {
 	while (!force_quit) {
 
 		process_events(); // get rid of pending events
-		if (Main::iteration() == true)
+		if (Main::iteration())
 			break;
 	};