fix(ui): remove check for launchUrl

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

@@ -259,6 +259,7 @@ class FileAttachment extends AttachmentWidget {
         splashRadius: 16,
         onPressed: () {
           final assetUrl = attachment.assetUrl;
+          print('assetUrl: $assetUrl');
           if (assetUrl != null) launchURL(context, assetUrl);
         },
       );

packages/stream_chat_flutter/lib/src/utils.dart

@@ -8,9 +8,9 @@ import 'package:url_launcher/url_launcher.dart';
 
 /// Launch URL
 Future<void> launchURL(BuildContext context, String url) async {
-  if (await canLaunch(url)) {
+  try {
     await launch(url);
-  } else {
+  } catch (e) {
     ScaffoldMessenger.of(context).showSnackBar(
       SnackBar(content: Text(context.translations.launchUrlError)),
     );