Move advanced info into own activity

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/Preferences.java

@@ -157,16 +157,6 @@ public class Preferences {
         editor.commit();
     }
 
-    public boolean getShowAdvancedTabs() {
-        return mSharedPreferences.getBoolean(Pref.SHOW_ADVANCED_TABS, false);
-    }
-
-    public void setShowAdvancedTabs(boolean value) {
-        SharedPreferences.Editor editor = mSharedPreferences.edit();
-        editor.putBoolean(Pref.SHOW_ADVANCED_TABS, value);
-        editor.commit();
-    }
-
     public boolean getCachedConsolidate() {
         return mSharedPreferences.getBoolean(Pref.CACHED_CONSOLIDATE, false);
     }