Remove ScrollViewDelegate

It was mistakingly merged int.

android/app/src/main/java/com/reactnativenavigation/views/ScrollViewDelegate.java

-package com.reactnativenavigation.views;
-
-import android.view.View;
-import android.view.ViewTreeObserver;
-import android.widget.ScrollView;
-
-import com.reactnativenavigation.utils.SdkSupports;
-
-public class ScrollViewDelegate implements ViewTreeObserver.OnScrollChangedListener {
-
-    public interface OnScrollListener {
-        void onScroll(ScrollView scrollView);
-    }
-
-    private ScrollView scrollView;
-    private OnScrollListener listener;
-
-    public ScrollViewDelegate() {
-    }
-
-    public void onViewAdded(View child) {
-        if (child instanceof ScrollView) {
-            detach();
-            scrollView = (ScrollView) child;
-            if (SdkSupports.marshmallow()) {
-                scrollView.setOnScrollChangeListener(new View.OnScrollChangeListener() {
-                    @Override
-                    public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
-                        ScrollViewDelegate.this.onScrollChanged();
-                    }
-                });
-            } else {
-                scrollView.getViewTreeObserver().addOnScrollChangedListener(this);
-            }
-        }
-    }
-
-    private void detach() {
-        if (scrollView != null) {
-            if (SdkSupports.marshmallow()) {
-                scrollView.setOnScrollChangeListener(null);
-            } else {
-                scrollView.getViewTreeObserver().removeOnScrollChangedListener(this);
-            }
-            scrollView = null;
-        }
-    }
-
-    public void setListener(OnScrollListener listener) {
-        this.listener = listener;
-    }
-
-    @Override
-    public void onScrollChanged() {
-        if (this.listener != null) {
-            this.listener.onScroll(scrollView);
-        }
-    }
-}