remove unused pkg

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/proxy.dart

@@ -1,31 +0,0 @@
-import 'dart:io';
-
-import 'package:system_proxy/system_proxy.dart';
-
-class CustomProxy {
-  Future<void> init() async {
-    Map<String, String>? proxy = await SystemProxy.getProxySettings();
-    if (proxy != null) {
-      HttpOverrides.global = ProxiedHttpOverrides(
-        proxy['host']!,
-        proxy['port']!,
-      );
-    }
-  }
-}
-
-class ProxiedHttpOverrides extends HttpOverrides {
-  final String _port;
-  final String _host;
-
-  ProxiedHttpOverrides(this._host, this._port);
-
-  @override
-  HttpClient createHttpClient(SecurityContext? context) {
-    return super.createHttpClient(context)
-      // set proxy
-      ..findProxy = (uri) {
-        return "PROXY $_host:$_port;";
-      };
-  }
-}