Add preference upgrade class to remove find and replace dev setting

Author: lukstbit

AnkiDroid/src/main/java/com/ichi2/anki/servicelayer/PreferenceUpgradeService.kt

@@ -137,6 +137,7 @@ object PreferenceUpgradeService {
                     yield(UpgradeToggleBacksideOnlyControl())
                     yield(UpgradeThemes())
                     yield(UpgradeAnswerControls())
+                    yield(RemoveDeveloperFindReplace())
                 }
 
             /** Returns a list of preference upgrade classes which have not been applied */
@@ -900,6 +901,14 @@ object PreferenceUpgradeService {
                 }
             }
         }
+
+        internal class RemoveDeveloperFindReplace : PreferenceUpgrade(28) {
+            override fun upgrade(preferences: SharedPreferences) {
+                preferences.edit {
+                    remove("browserFindReplace")
+                }
+            }
+        }
     }
 }