removed hive imports

lib/model/bookmark.dart

@@ -1,6 +1,4 @@
-import 'package:hive/hive.dart';
-
-class Bookmark extends HiveObject {
+class Bookmark {
   Bookmark({required this.name, required this.link});
 
   factory Bookmark.fromJson(Map<String, dynamic> json) =>

lib/model/collection.dart

@@ -1,6 +1,4 @@
-import 'package:hive/hive.dart';
-
-class Collection extends HiveObject {
+class Collection {
   Collection({required this.name});
 
   factory Collection.fromJson(Map<String, dynamic> json) =>