Remove emscripten_cancel_main_loop from web exit_callback

(cherry picked from commit 043a6b60be92b72eca78dd1f81942ceee84f6d40)

platform/web/web_main.cpp

@@ -70,7 +70,6 @@ void exit_callback() {
 	delete os; // We used a normal new, so it needs a normal delete.
 	os = nullptr;
 	godot_cleanup_profiler();
-	emscripten_cancel_main_loop(); // We are exiting in this iteration.
 	emscripten_force_exit(exit_code); // Exit runtime.
 }