v1.0.14 chat completion fix

lib/model/openai_chat_message.dart

@@ -9,14 +9,12 @@ extension ChatRoleExt on ChatRole {
 class OpenAIChatMessage {
   late ChatRole role; // JSON of ChatMessage
   late String content;
-  String? name;
 
   OpenAIChatMessage(this.role, this.content, {String? name});
 
   OpenAIChatMessage.fromJson(Map json) {
     role = toChatRole(json['role']);
     content = json['content'];
-    name = json['name'] ?? "";
   }
 
   ChatRole toChatRole(String strRole) {
@@ -33,7 +31,6 @@ class OpenAIChatMessage {
   Map<String, dynamic> toJson() => {
         "role": role.enumToStr(),
         "content": content,
-        "name": name,
       };
 
   @override