Remove dead code and unused helper (#1183)

* Remove unnecessary check

* Remove helper class

src/Helpers.php

@@ -1,13 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Barryvdh\LaravelIdeHelper;
-
-class Helpers
-{
-    public static function isLaravel(): bool
-    {
-        return class_exists('Illuminate\Foundation\Application');
-    }
-}

src/IdeHelperServiceProvider.php

@@ -120,10 +120,6 @@ class IdeHelperServiceProvider extends ServiceProvider implements DeferrableProv
     {
         $resolver = new EngineResolver();
         $resolver->register('php', function () {
-            if (Helpers::isLaravel() && (int) Application::VERSION < 8) {
-                return new PhpEngine();
-            }
-
             return new PhpEngine($this->app['files']);
         });
         $finder = new FileViewFinder($this->app['files'], [__DIR__ . '/../resources/views']);