Revert "bug #38063 [FrameworkBundle] generate preload.php in src/ to make opcache.preload predictable (nicolas-grekas)"

This reverts commit d441d867cd1da214b1c9662568b11632e8e57f52, reversing
changes made to 043e7c34de230179a993cfb8afb964dee9eef8de.

Author: nicolas-grekas

Command/CacheClearCommand.php

@@ -170,20 +170,6 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             }
         }
 
-        $kernelDir = \dirname((new \ReflectionObject($kernel))->getFileName());
-        $preloadFile = $fs->makePathRelative(\dirname($containerFile, 2), $kernelDir);
-        $preloadFile .= substr_replace(basename($containerFile), '.preload', -4, 0);
-        $preloadFile = var_export('/'.$preloadFile, true);
-        @file_put_contents($kernelDir.'/.preload.php', <<<EOPHP
-<?php
-
-if (file_exists(__DIR__.$preloadFile)) {
-    require __DIR__.$preloadFile;
-}
-
-EOPHP
-        );
-
         if ($output->isVerbose()) {
             $io->comment('Finished');
         }

Tests/Command/CacheClearCommand/CacheClearCommandTest.php

@@ -38,7 +38,6 @@ protected function setUp(): void
     protected function tearDown(): void
     {
         $this->fs->remove($this->kernel->getProjectDir());
-        $this->fs->remove(__DIR__.'/Fixture/.preload.php');
     }
 
     public function testCacheIsFreshAfterCacheClearedWithWarmup()
@@ -83,7 +82,5 @@ public function testCacheIsFreshAfterCacheClearedWithWarmup()
         $containerRef = new \ReflectionClass(require $containerFile);
         $containerFile = str_replace('tes_'.\DIRECTORY_SEPARATOR, 'test'.\DIRECTORY_SEPARATOR, $containerRef->getFileName());
         $this->assertMatchesRegularExpression(sprintf('/\'kernel.container_class\'\s*=>\s*\'%s\'/', $containerClass), file_get_contents($containerFile), 'kernel.container_class is properly set on the dumped container');
-
-        $this->assertFileEquals(__DIR__.'/Fixture/preload.php.expected', __DIR__.'/Fixture/.preload.php');
     }
 }