chore: fix dart lint

Author: MoKamall

lib/src/modules/crash_reporting.dart

@@ -2,7 +2,6 @@
 
 import 'dart:async';
 import 'dart:convert';
-import 'dart:io';
 
 import 'package:flutter/foundation.dart';
 import 'package:instabug_flutter/src/generated/crash_reporting.api.g.dart';