Remove confusing comment from firebase_database (flutter#480)

collinjackson · web-flow · commit 659aaa1db26b · 2018-04-09T15:12:38.000-07:00
diff --git a/packages/firebase_database/lib/ui/firebase_list.dart b/packages/firebase_database/lib/ui/firebase_list.dart
@@ -85,7 +85,6 @@ class FirebaseList extends ListBase<DataSnapshot>
 
   int _indexForKey(String key) {
     assert(key != null);
-    // TODO(jackson): We could binary search since the list is already sorted.
     for (int index = 0; index < _snapshots.length; index++) {
       if (key == _snapshots[index].key) {
         return index;
