commit 2cf21fdc0107f1468448c69d670862b403e17dd6
Author: Leszek Koltunski <leszek@koltunski.pl>
Date:   Tue Nov 15 12:58:27 2022 +0100

    Partly merge the 'iap' branch.

diff --git a/src/main/java/org/distorted/tutorials/TutorialActivity.java b/src/main/java/org/distorted/tutorials/TutorialActivity.java
index d35ca5bf..b0852ccf 100644
--- a/src/main/java/org/distorted/tutorials/TutorialActivity.java
+++ b/src/main/java/org/distorted/tutorials/TutorialActivity.java
@@ -22,8 +22,6 @@ import android.widget.LinearLayout;
 
 import androidx.appcompat.app.AppCompatActivity;
 
-import com.google.firebase.analytics.FirebaseAnalytics;
-
 import org.distorted.library.main.DistortedLibrary;
 
 import org.distorted.objectlib.main.ObjectControl;
@@ -53,7 +51,6 @@ public class TutorialActivity extends AppCompatActivity
                                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
 
-    private FirebaseAnalytics mFirebaseAnalytics;
     private static int mScreenWidth, mScreenHeight;
     private int mCurrentApiVersion;
     private TutorialScreen mScreen;
@@ -79,8 +76,6 @@ public class TutorialActivity extends AppCompatActivity
         mObjectOrdinal = b.getInt("obj");
         }
 
-      mFirebaseAnalytics = FirebaseAnalytics.getInstance(this);
-
       DisplayMetrics displaymetrics = new DisplayMetrics();
       getWindowManager().getDefaultDisplay().getRealMetrics(displaymetrics);
       mScreenWidth =displaymetrics.widthPixels;
@@ -238,13 +233,6 @@ public class TutorialActivity extends AppCompatActivity
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 // PUBLIC API
-///////////////////////////////////////////////////////////////////////////////////////////////////
-
-    public FirebaseAnalytics getAnalytics()
-      {
-      return mFirebaseAnalytics;
-      }
-
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
     public int getScreenWidthInPixels()