rm unused codes

lib/fluwx.dart

@@ -7,5 +7,4 @@ library fluwx;
 export 'src/fluwx_iml.dart';
 export 'src/models/wechat_response.dart';
 export 'src/models/wechat_share_models.dart';
-export 'src/wechat_reponse.dart';
 export 'src/wechat_type.dart';

lib/src/wechat_reponse.dart

-/*
- * Copyright (C) 2018 The OpenFlutter Organization
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-class WeChatResponseCode {
-  static const int ERR_OK = 0;
-  static const int ERR_COMM = -1;
-  static const int ERR_USER_CANCEL = -2;
-  static const int ERR_SENT_FAILED = -3;
-  static const int ERR_AUTH_DENIED = -4;
-  static const int ERR_UNSUPPORTED = -5;
-  static const int ERR_BAN = -6;
-}
-
-class WeChatResponseKey {
-  static const String TYPE = "type";
-  static const String ERR_CODE = "errCode";
-  static const String ERR_STR = "errStr";
-  static const String TRANSACTION = "transaction";
-  static const String OPEN_ID = "openId";
-}