diff --git a/app/src/main/java/it/niedermann/owncloud/notes/about/AboutActivity.java b/app/src/main/java/it/niedermann/owncloud/notes/about/AboutActivity.java
index b84024bd..5f5c64f9 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/about/AboutActivity.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/about/AboutActivity.java
@@ -26,7 +26,6 @@ import it.niedermann.owncloud.notes.databinding.ActivityAboutBinding;
 public class AboutActivity extends LockedActivity {
 
     private ActivityAboutBinding binding;
-    private final static int POS_CREDITS = 0;
     private final static int POS_CONTRIB = 1;
     private final static int POS_LICENSE = 2;
     private final static int TOTAL_COUNT = 3;
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/edit/EditNoteActivity.java b/app/src/main/java/it/niedermann/owncloud/notes/edit/EditNoteActivity.java
index 097fa14a..cb59994e 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/edit/EditNoteActivity.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/edit/EditNoteActivity.java
@@ -21,7 +21,6 @@ import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
-import androidx.lifecycle.ViewModelProvider;
 import androidx.preference.PreferenceManager;
 
 import com.nextcloud.android.sso.exceptions.NextcloudFilesAppAccountNotFoundException;
@@ -41,7 +40,6 @@ import it.niedermann.owncloud.notes.R;
 import it.niedermann.owncloud.notes.accountpicker.AccountPickerListener;
 import it.niedermann.owncloud.notes.branding.BrandingUtil;
 import it.niedermann.owncloud.notes.databinding.ActivityEditBinding;
-import it.niedermann.owncloud.notes.edit.category.CategoryViewModel;
 import it.niedermann.owncloud.notes.main.MainActivity;
 import it.niedermann.owncloud.notes.persistence.NotesRepository;
 import it.niedermann.owncloud.notes.persistence.entity.Account;
@@ -63,7 +61,6 @@ public class EditNoteActivity extends LockedActivity implements BaseNoteFragment
     public static final String PARAM_CONTENT = "content";
     public static final String PARAM_FAVORITE = "favorite";
 
-    private CategoryViewModel categoryViewModel;
     private ActivityEditBinding binding;
 
     private BaseNoteFragment fragment;
@@ -91,9 +88,7 @@ public class EditNoteActivity extends LockedActivity implements BaseNoteFragment
                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
             }
         });
-
-
-        categoryViewModel = new ViewModelProvider(this).get(CategoryViewModel.class);
+        
         binding = ActivityEditBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
         setSupportActionBar(binding.toolbar);
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/edit/category/CategoryDialogFragment.java b/app/src/main/java/it/niedermann/owncloud/notes/edit/category/CategoryDialogFragment.java
index 5976aea3..500a5bcf 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/edit/category/CategoryDialogFragment.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/edit/category/CategoryDialogFragment.java
@@ -38,7 +38,6 @@ import it.niedermann.owncloud.notes.shared.util.KeyboardUtils;
  */
 public class CategoryDialogFragment extends BrandedDialogFragment {
 
-    private static final String TAG = CategoryDialogFragment.class.getSimpleName();
     private static final String STATE_CATEGORY = "category";
 
     private CategoryViewModel viewModel;
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/edit/title/EditTitleDialogFragment.java b/app/src/main/java/it/niedermann/owncloud/notes/edit/title/EditTitleDialogFragment.java
index 860e81c2..55b3bddb 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/edit/title/EditTitleDialogFragment.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/edit/title/EditTitleDialogFragment.java
@@ -25,7 +25,6 @@ import it.niedermann.owncloud.notes.shared.util.KeyboardUtils;
 
 public class EditTitleDialogFragment extends BrandedDialogFragment {
 
-    private static final String TAG = EditTitleDialogFragment.class.getSimpleName();
     static final String PARAM_OLD_TITLE = "old_title";
     private DialogEditTitleBinding binding;
 
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/main/MainActivity.java b/app/src/main/java/it/niedermann/owncloud/notes/main/MainActivity.java
index 5374c882..2e1e809d 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/main/MainActivity.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/main/MainActivity.java
@@ -81,7 +81,6 @@ import it.niedermann.owncloud.notes.databinding.ActivityNotesListViewBinding;
 import it.niedermann.owncloud.notes.databinding.DrawerLayoutBinding;
 import it.niedermann.owncloud.notes.edit.EditNoteActivity;
 import it.niedermann.owncloud.notes.edit.category.CategoryDialogFragment;
-import it.niedermann.owncloud.notes.edit.category.CategoryViewModel;
 import it.niedermann.owncloud.notes.exception.ExceptionDialogFragment;
 import it.niedermann.owncloud.notes.exception.IntendedOfflineException;
 import it.niedermann.owncloud.notes.importaccount.ImportAccountActivity;
@@ -114,7 +113,6 @@ public class MainActivity extends LockedActivity implements NoteClickListener, A
     protected final ExecutorService executor = Executors.newCachedThreadPool();
 
     protected MainViewModel mainViewModel;
-    private CategoryViewModel categoryViewModel;
 
     private boolean gridView = true;
 
@@ -150,7 +148,6 @@ public class MainActivity extends LockedActivity implements NoteClickListener, A
         super.onCreate(savedInstanceState);
 
         mainViewModel = new ViewModelProvider(this).get(MainViewModel.class);
-        categoryViewModel = new ViewModelProvider(this).get(CategoryViewModel.class);
         CapabilitiesWorker.update(this);
         binding = DrawerLayoutBinding.inflate(getLayoutInflater());
         activityBinding = ActivityNotesListViewBinding.bind(binding.activityNotesListView.getRoot());
diff --git a/app/src/main/java/it/niedermann/owncloud/notes/main/items/ItemAdapter.java b/app/src/main/java/it/niedermann/owncloud/notes/main/items/ItemAdapter.java
index 028f10aa..40d94174 100644
--- a/app/src/main/java/it/niedermann/owncloud/notes/main/items/ItemAdapter.java
+++ b/app/src/main/java/it/niedermann/owncloud/notes/main/items/ItemAdapter.java
@@ -45,7 +45,6 @@ import it.niedermann.owncloud.notes.shared.model.NoteClickListener;
 
 public class ItemAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements Branded {
 
-    private static final String TAG = ItemAdapter.class.getSimpleName();
 
     public static final int TYPE_SECTION = 0;
     public static final int TYPE_NOTE_WITH_EXCERPT = 1;