refactor: Remove unnecessary parentheses in Bucket.fromJson (#1201)

Author: felixkamau

packages/storage_client/lib/src/types.dart

@@ -27,7 +27,7 @@ class Bucket {
   });
 
   Bucket.fromJson(Map<String, dynamic> json)
-      : id = (json)['id'] as String,
+      : id = json['id'] as String,
         name = json['name'] as String,
         owner = json['owner'] as String,
         createdAt = json['created_at'] as String,