minor #34284 [ErrorHandler] Remove Symfony ClassLoader support in an …

…error enhancer (fancyweb)

This PR was merged into the 5.0-dev branch.

Discussion
----------

[ErrorHandler] Remove Symfony ClassLoader support in an error enhancer

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | #33053 (comment)
| License       | MIT
| Doc PR        | -

Throwing a deprecation for this on 4.4 looks useless to me as the component was deprecated 2 years ago and stopping its support will not break anything.

Commits
-------

e745654 [ErrorHandler] Remove Symfony ClassLoader support in an error enhancer

src/Symfony/Component/ErrorHandler/ErrorEnhancer/ClassNotFoundErrorEnhancer.php

@@ -11,8 +11,7 @@
 
 namespace Symfony\Component\ErrorHandler\ErrorEnhancer;
 
-use Composer\Autoload\ClassLoader as ComposerClassLoader;
-use Symfony\Component\ClassLoader\ClassLoader as SymfonyClassLoader;
+use Composer\Autoload\ClassLoader;
 use Symfony\Component\ErrorHandler\DebugClassLoader;
 use Symfony\Component\ErrorHandler\Error\ClassNotFoundError;
 use Symfony\Component\ErrorHandler\Error\FatalError;
@@ -107,14 +106,13 @@ private function getClassCandidates(string $class): array
                 }
             }
 
-            if ($function[0] instanceof ComposerClassLoader || $function[0] instanceof SymfonyClassLoader) {
+            if ($function[0] instanceof ClassLoader) {
                 foreach ($function[0]->getPrefixes() as $prefix => $paths) {
                     foreach ($paths as $path) {
                         $classes = array_merge($classes, $this->findClassInPath($path, $class, $prefix));
                     }
                 }
-            }
-            if ($function[0] instanceof ComposerClassLoader) {
+
                 foreach ($function[0]->getPrefixesPsr4() as $prefix => $paths) {
                     foreach ($paths as $path) {
                         $classes = array_merge($classes, $this->findClassInPath($path, $class, $prefix));