Delete unused logic

These two functions were related to previous modal implementation which relied on Dialogs

lib/android/app/src/main/java/com/reactnativenavigation/viewcontrollers/ViewController.java

         return getView().equals(component);
     }
 
-    public void onViewRegainedFocus() {
-        applyOptions(options);
-    }
-
-    public void onViewLostFocus() {
-
-    }
-
     public void onViewWillAppear() {
 
     }