remove transparent_image dependency out of plugin

lib/photo_gallery.dart

@@ -8,7 +8,6 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/painting.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
-import 'package:transparent_image/transparent_image.dart';
 
 part 'src/common/medium_type.dart';
 part 'src/image_providers/album_thumbnail_provider.dart';

lib/src/image_providers/album_thumbnail_provider.dart

@@ -34,8 +34,7 @@ class AlbumThumbnailProvider extends ImageProvider<AlbumThumbnailProvider> {
       width: width,
       highQuality: highQuality,
     );
-    if (bytes == null || bytes.length == 0)
-      return await decode(kTransparentImage);
+    if (bytes == null || bytes.length == 0) return null;
 
     return await decode(bytes);
   }

pubspec.lock

@@ -156,13 +156,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.2.15"
-  transparent_image:
-    dependency: "direct main"
-    description:
-      name: transparent_image
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
   typed_data:
     dependency: transitive
     description:

pubspec.yaml

@@ -10,7 +10,6 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  transparent_image: ^1.0.0
 
 dev_dependencies:
   flutter_test: