cleanup

packages/stream_chat_flutter/lib/src/attachment/file_attachment.dart

@@ -6,7 +6,6 @@ import 'package:stream_chat_flutter/src/stream_svg_icon.dart';
 import 'package:stream_chat_flutter/src/utils.dart';
 import 'package:stream_chat_flutter/src/video_thumbnail_image.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
-import 'package:transparent_image/transparent_image.dart';
 
 import '../upload_progress_indicator.dart';
 import 'attachment_widget.dart';

packages/stream_chat_flutter/lib/src/attachment/giphy_attachment.dart

@@ -1,10 +1,7 @@
-import 'dart:typed_data';
-
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
 import 'package:shimmer/shimmer.dart';
 import 'package:stream_chat_flutter_core/stream_chat_flutter_core.dart';
-import 'package:transparent_image/transparent_image.dart';
 
 import '../full_screen_media.dart';
 import '../stream_chat_theme.dart';

packages/stream_chat_flutter/lib/src/message_widget.dart

@@ -927,7 +927,7 @@ class _MessageWidgetState extends State<MessageWidget>
   }
 
   Widget _parseAttachments() {
-    Map<String, List<Attachment>> attachmentGroups = {};
+    final attachmentGroups = <String, List<Attachment>>{};
 
     widget.message.attachments
         .where((element) => element.ogScrapeUrl == null)
@@ -939,7 +939,7 @@ class _MessageWidgetState extends State<MessageWidget>
       attachmentGroups[e.type].add(e);
     });
 
-    List<Widget> attachmentList = [];
+    final attachmentList = <Widget>[];
 
     attachmentGroups.forEach((type, attachments) {
       final attachmentBuilder = widget.attachmentBuilders[type];