Fix static analysis error

lib/src/widgets/text_block.dart

@@ -2,14 +2,20 @@ import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:tuple/tuple.dart';
 
-import '../../flutter_quill.dart';
+import '../models/documents/attribute.dart';
 import '../models/documents/nodes/block.dart';
 import '../models/documents/nodes/line.dart';
 import '../utils/delta.dart';
 import 'box.dart';
+import 'controller.dart';
 import 'cursor.dart';
+import 'default_styles.dart';
 import 'delegate.dart';
+import 'editor.dart';
 import 'link.dart';
+import 'style_widgets/bullet_point.dart';
+import 'style_widgets/checkbox_point.dart';
+import 'style_widgets/number_point.dart';
 import 'text_line.dart';
 import 'text_selection.dart';