Fix method to remove Preference

Preference instances that were not direct children of the Fragment's root PreferenceScreen were not removed.

app/src/main/java/org/tasks/injection/InjectingPreferenceFragment.kt

@@ -87,9 +87,7 @@ abstract class InjectingPreferenceFragment : PreferenceFragmentCompat() {
     private fun remove(preferenceGroup: PreferenceGroup, resIds: IntArray) {
         for (resId in resIds) {
             val preference: Preference? = preferenceGroup.findPreference(getString(resId))
-            if (preference != null) {
-                preferenceGroup.removePreference(preference)
-            }
+            preference?.parent?.removePreference(preference)
         }
     }