Address some build warnings

app/src/main/java/eu/kanade/tachiyomi/ui/manga/track/SetTrackReadingDatesDialog.kt

@@ -40,6 +40,7 @@ class SetTrackReadingDatesDialog<T> : DialogController
         dateToUpdate = ReadingDate.Start
     }
 
+    @Suppress("DEPRECATION")
     override fun onCreateDialog(savedViewState: Bundle?): Dialog {
         return MaterialDialog(activity!!)
             .title(
@@ -49,10 +50,10 @@ class SetTrackReadingDatesDialog<T> : DialogController
                 }
             )
             .datePicker(currentDate = getCurrentDate()) { _, date ->
-                listener?.setReadingDate(item, dateToUpdate, date.timeInMillis)
+                listener.setReadingDate(item, dateToUpdate, date.timeInMillis)
             }
             .neutralButton(R.string.action_remove) {
-                listener?.setReadingDate(item, dateToUpdate, 0L)
+                listener.setReadingDate(item, dateToUpdate, 0L)
             }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/manga/track/TrackSearchDialog.kt

@@ -51,6 +51,7 @@ class TrackSearchDialog : DialogController {
         service = Injekt.get<TrackManager>().getService(bundle.getInt(KEY_SERVICE))!!
     }
 
+    @Suppress("DEPRECATION")
     override fun onCreateDialog(savedViewState: Bundle?): Dialog {
         binding = TrackSearchDialogBinding.inflate(LayoutInflater.from(activity!!))
         val dialog = MaterialDialog(activity!!)