TF-106 Fix display inlined image CIDs of emails

lib/features/composer/data/network/composer_api.dart

@@ -2,7 +2,6 @@
 import 'dart:io';
 
 import 'package:core/core.dart';
-import 'package:dio/dio.dart';
 import 'package:model/model.dart';
 
 class ComposerAPI {
@@ -14,14 +13,7 @@ class ComposerAPI {
   Future<UploadResponse> uploadAttachment(UploadRequest uploadRequest) async {
     final resultJson = await _dioClient.post(
         Uri.decodeFull(uploadRequest.uploadUrl.toString()),
-        options: Options(headers: _buildHeaderRequestParam()),
         data: File(uploadRequest.fileInfo.filePath).readAsBytesSync());
     return UploadResponse.fromJson(resultJson);
   }
-
-  Map<String, dynamic> _buildHeaderRequestParam() {
-    final headerParam = _dioClient.getHeaders();
-    headerParam[HttpHeaders.acceptHeader] = DioClient.jmapHeader;
-    return headerParam;
-  }
 }