Fix various java warnings

Change-Id: I4c4381e1755831df2c4f41279800fd6af173e4ed

src/org/lineageos/setupwizard/ThemeSettingsActivity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023 The LineageOS Project
+ * Copyright (C) 2023-2024 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,7 +24,6 @@ import android.widget.RadioGroup;
 import androidx.annotation.Nullable;
 
 public class ThemeSettingsActivity extends BaseSetupWizardActivity {
-    public static final String TAG = ThemeSettingsActivity.class.getSimpleName();
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {