Remove redundant isolate uses

Author: didarul-codes

example/android/app/build.gradle

@@ -47,7 +47,7 @@ android {
         applicationId "com.islamdidarmd.example.adblockerwebview.flutter.example"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion 19
+        minSdkVersion flutter.minSdkVersion
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

lib/src/data/repository/adblocker_repository_impl.dart

@@ -1,10 +1,8 @@
 import 'dart:convert';
-import 'dart:isolate';
 
 import 'package:adblocker_webview/src/domain/entity/host.dart';
 import 'package:adblocker_webview/src/domain/repository/adblocker_repository.dart';
 import 'package:flutter/foundation.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 
 class AdBlockerRepositoryImpl implements AdBlockerRepository {
@@ -29,14 +27,8 @@ class AdBlockerRepositoryImpl implements AdBlockerRepository {
   }
 
   Future<String> _getDataWithCache(String url) async {
-    final isolateToken = ServicesBinding.rootIsolateToken!;
-    return Isolate.run(
-      () async {
-        BackgroundIsolateBinaryMessenger.ensureInitialized(isolateToken);
-        final cacheManager = DefaultCacheManager();
-        final file = await cacheManager.getSingleFile(url);
-        return file.readAsString();
-      },
-    );
+    final cacheManager = DefaultCacheManager();
+    final file = await cacheManager.getSingleFile(url);
+    return file.readAsString();
   }
 }