Clean up code

lib/src/widgets/delegate.dart

@@ -6,7 +6,6 @@ import 'package:flutter/scheduler.dart';
 import '../models/documents/attribute.dart';
 import '../models/documents/nodes/leaf.dart';
 import '../utils/platform.dart';
-import 'controller.dart';
 import 'editor.dart';
 import 'embeds.dart';
 import 'text_selection.dart';

lib/src/widgets/editor.dart

@@ -12,7 +12,6 @@ import 'package:i18n_extension/i18n_widget.dart';
 
 import '../models/documents/document.dart';
 import '../models/documents/nodes/container.dart' as container_node;
-import '../models/documents/nodes/embeddable.dart';
 import '../models/documents/nodes/leaf.dart';
 import '../models/documents/style.dart';
 import '../models/structs/offset_value.dart';