Remove Debug component leftovers

Author: chalasr

DeprecationErrorHandler/Deprecation.php

@@ -16,7 +16,6 @@
 use PHPUnit\Metadata\Api\Groups;
 use PHPUnit\Util\Test;
 use Symfony\Bridge\PhpUnit\Legacy\SymfonyTestsListenerFor;
-use Symfony\Component\Debug\DebugClassLoader as LegacyDebugClassLoader;
 use Symfony\Component\ErrorHandler\DebugClassLoader;
 
 class_exists(Groups::class);
@@ -81,7 +80,7 @@ public function __construct($message, array $trace, $file)
             }
 
             if ('trigger_error' === $trace[$j]['function'] && !isset($trace[$j]['class'])) {
-                if (\in_array($trace[1 + $j]['class'], [DebugClassLoader::class, LegacyDebugClassLoader::class], true)) {
+                if (DebugClassLoader::class === $trace[1 + $j]['class']) {
                     $class = $trace[1 + $j]['args'][0];
                     $this->triggeringFile = isset($trace[1 + $j]['args'][1]) ? realpath($trace[1 + $j]['args'][1]) : (new \ReflectionClass($class))->getFileName();
                     $this->getOriginalFilesStack();
@@ -323,9 +322,6 @@ private static function getVendors()
             if (class_exists(DebugClassLoader::class, false)) {
                 self::$vendors[] = \dirname((new \ReflectionClass(DebugClassLoader::class))->getFileName());
             }
-            if (class_exists(LegacyDebugClassLoader::class, false)) {
-                self::$vendors[] = \dirname((new \ReflectionClass(LegacyDebugClassLoader::class))->getFileName());
-            }
             foreach (get_declared_classes() as $class) {
                 if ('C' === $class[0] && 0 === strpos($class, 'ComposerAutoloaderInit')) {
                     $r = new \ReflectionClass($class);

Legacy/SymfonyTestsListenerTrait.php

@@ -23,7 +23,6 @@
 use Symfony\Bridge\PhpUnit\ClockMock;
 use Symfony\Bridge\PhpUnit\DnsMock;
 use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
-use Symfony\Component\Debug\DebugClassLoader as LegacyDebugClassLoader;
 use Symfony\Component\ErrorHandler\DebugClassLoader;
 
 /**
@@ -61,7 +60,7 @@ public function __construct(array $mockedNamespaces = [])
             Blacklist::$blacklistedClassNames[__CLASS__] = 2;
         }
 
-        $enableDebugClassLoader = class_exists(DebugClassLoader::class) || class_exists(LegacyDebugClassLoader::class);
+        $enableDebugClassLoader = class_exists(DebugClassLoader::class);
 
         foreach ($mockedNamespaces as $type => $namespaces) {
             if (!\is_array($namespaces)) {
@@ -82,11 +81,7 @@ public function __construct(array $mockedNamespaces = [])
             }
         }
         if ($enableDebugClassLoader) {
-            if (class_exists(DebugClassLoader::class)) {
-                DebugClassLoader::enable();
-            } else {
-                LegacyDebugClassLoader::enable();
-            }
+            DebugClassLoader::enable();
         }
         if (self::$globallyEnabled) {
             $this->state = -2;