use native check type

phpstan.neon

@@ -137,6 +137,10 @@ parameters:
             message: '#Function "var_dump\(\)" cannot be used/left in the code#'
             path: src/functions/node_helper.php
 
+        -
+            message: '#Function "class_exists\(\)" cannot be used/left in the code#'
+            path: src/Configuration/OnlyRuleResolver.php
+
         # lack of generic array in nikic/php-parser
         - '#Method (.*?) should return array<PhpParser\\Node\\(.*?)\> but returns array<PhpParser\\Node\>#'
 

src/Configuration/OnlyRuleResolver.php

@@ -4,7 +4,6 @@
 
 namespace Rector\Configuration;
 
-use PHPStan\Reflection\ReflectionProvider;
 use Rector\Contract\Rector\RectorInterface;
 use Rector\Exception\Configuration\RectorRuleNameAmbiguousException;
 use Rector\Exception\Configuration\RectorRuleNotFoundException;
@@ -19,7 +18,6 @@
      */
     public function __construct(
         private array $rectors,
-        private ReflectionProvider $reflectionProvider
     ) {
     }
 
@@ -104,16 +102,16 @@ public function resolve(string $rule): string
      */
     private function isRectorRuleClass(string $className): bool
     {
-        if (! $this->reflectionProvider->hasClass($className)) {
+        if (! class_exists($className)) {
             return false;
         }
 
-        $classReflection = $this->reflectionProvider->getClass($className);
-        if ($classReflection->isAbstract()) {
+        $reflectionClass = new \ReflectionClass($className);
+        if ($reflectionClass->isAbstract()) {
             return false;
         }
 
-        return $classReflection->implementsInterface(RectorInterface::class);
+        return $reflectionClass->implementsInterface(RectorInterface::class);
     }
 
     private function createUnregisteredMessage(string $ruleClass): string

tests/Configuration/OnlyRuleResolverTest.php

@@ -27,7 +27,6 @@ protected function setUp(): void
 
         $this->onlyRuleResolver = new OnlyRuleResolver(
             iterator_to_array($rectorConfig->tagged(RectorInterface::class)),
-            $this->make(ReflectionProvider::class)
         );
     }