refactor(authentication): remove unused import

- Remove unused import statement for 'package:flutter/services.dart'
- This change simplifies the code and reduces potential confusion for developers

Author: fulleni

lib/authentication/view/email_code_verification_page.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/app/bloc/app_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/app/config/config.dart';