Loaded 2 async scenes: how to unload or remove 1 of them?

Questions & Answers
1

Basically I want to load 2 scenes, and then I want the player to be able to choose 1 of them to activate, using allowSceneActivation = true on one of the /AsyncOperation/, and I want to trash the other scene so I can load it at a later stage, or not load it all ever.

How do I do that?

I want something along those lines:

        AsyncOperation async1;
        AsyncOperation async2;
        AsyncOperation playerChosenAsync;
    
        void LoadSceneAsync(string sceneName1, string sceneName2){
                AsyncOperation async1 = Application.LoadLevelAsync(sceneName1);
                async1.allowSceneActivation = false;
        
                AsyncOperation async2 = Application.LoadLevelAsync(sceneName2);
                async2.allowSceneActivation = false;
        }
    
    void ActivateScene(AsyncOperation sceneToActivate){
        sceneToActivate.allowSceneActivation = true;
    }
    
    void TrashScene(AsyncOperation sceneToTrash){
        sceneToTrash.Trash(); // This method doesn't exist, 
                              // but I want to unload/delete do something here,
                              // to release memory/CPU/whatevs.
    }

    IEnumerator Update() {
            if(playerChosenSync == async1){
        TrashScene(async2);
       ActivateScene(async1);
      playerChosenSync = null;

} else if(playerChosenSync == async2){
        TrashScene(async1);
       ActivateScene(async2);
      playerChosenSync = null;
      }
}
2

Give a look at this Unity - Scripting API: SceneManager i think is only for 5.3.

Im still working in a project made in 5.2 so i dont tried this functions yet.