update linter

Author: warreth

lib/ui/epub_viewer.dart

@@ -3,7 +3,6 @@ import 'dart:io';
 
 // Flutter imports:
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 
 // Package imports:
 import 'package:epub_view/epub_view.dart';

lib/ui/onboarding/onboarding_page.dart

@@ -267,7 +267,7 @@ class _OnboardingPageState extends ConsumerState<OnboardingPage> {
               title: const Text("Enable Auto-Updates"),
               subtitle: const Text(
                   "Not recommended if you installed via F-Droid (F-Droid handles updates)."),
-              activeColor: Theme.of(context).colorScheme.secondary,
+              activeThumbColor: Theme.of(context).colorScheme.secondary,
               activeTrackColor:
                   Theme.of(context).colorScheme.secondary.withOpacity(0.5),
               inactiveThumbColor: Colors.grey,

lib/ui/settings_page.dart

@@ -395,7 +395,7 @@ class SettingsPage extends ConsumerWidget {
       child: SwitchListTile(
         value: value,
         onChanged: onChanged,
-        activeColor: Theme.of(context).colorScheme.secondary,
+        activeThumbColor: Theme.of(context).colorScheme.secondary,
         title: Text(title, style: const TextStyle(fontWeight: FontWeight.w600)),
         subtitle: subtitle != null
             ? Text(subtitle, style: const TextStyle(fontSize: 12))