Remove dead/unused code

lib/screens/EnrollmentScreen.dart

@@ -4,7 +4,6 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
-import 'package:flutter_svg/svg.dart';
 
 import 'package:mobile_nebula/components/SimplePage.dart';
 import 'package:url_launcher/url_launcher.dart';
@@ -152,8 +151,6 @@ class _EnrollmentScreenState extends State<EnrollmentScreen> {
       ]));
     }
 
-    final dnIcon =
-        Theme.of(context).brightness == Brightness.dark ? 'images/dn-logo-dark.svg' : 'images/dn-logo-light.svg';
     return SimplePage(
         title: Text('Enroll with Managed Nebula', style: TextStyle(fontWeight: FontWeight.bold)),
         child: Padding(child: child, padding: EdgeInsets.symmetric(horizontal: 10)),

lib/screens/MainScreen.dart

@@ -14,7 +14,6 @@ import 'package:mobile_nebula/models/IPAndPort.dart';
 import 'package:mobile_nebula/models/Site.dart';
 import 'package:mobile_nebula/models/StaticHosts.dart';
 import 'package:mobile_nebula/models/UnsafeRoute.dart';
-import 'package:mobile_nebula/screens/EnrollmentScreen.dart';
 import 'package:mobile_nebula/screens/SettingsScreen.dart';
 import 'package:mobile_nebula/screens/SiteDetailScreen.dart';
 import 'package:mobile_nebula/screens/siteConfig/SiteConfigScreen.dart';
@@ -303,15 +302,11 @@ class _MainScreenState extends State<MainScreen> {
   _loadSites() async {
     //TODO: This can throw, we need to show an error dialog
     Map<String, dynamic> rawSites = jsonDecode(await platform.invokeMethod('listSites'));
-    bool hasErrors = false;
 
     sites = [];
     rawSites.forEach((id, rawSite) {
       try {
         var site = Site.fromJson(rawSite);
-        if (site.errors.length > 0) {
-          hasErrors = true;
-        }
 
         //TODO: we need to cancel change listeners when we rebuild
         site.onChange().listen((_) {

lib/screens/SettingsScreen.dart

@@ -1,7 +1,6 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
-import 'package:flutter_svg/svg.dart';
 import 'package:mobile_nebula/components/SimplePage.dart';
 import 'package:mobile_nebula/components/config/ConfigItem.dart';
 import 'package:mobile_nebula/components/config/ConfigPageItem.dart';
@@ -86,8 +85,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
           )),
     ));
 
-    final dnIcon =
-        Theme.of(context).brightness == Brightness.dark ? 'images/dn-logo-dark.svg' : 'images/dn-logo-light.svg';
     items.add(ConfigSection(children: [
       ConfigPageItem(
           label: Text('Enroll with Managed Nebula'),

lib/validators/ipValidator.dart

@@ -23,7 +23,6 @@ bool ipValidator(String? str, bool enableIPV6) {
       {
         return true;
       }
-      break;
   }
 
   return false;