minor #798 removed unnecessary code (EhEhRon91)

This PR was squashed before being merged into the 1.13-dev branch.

Discussion
----------

removed unnecessary code

Fixes #775

Removed code that was implemented in #576 as this is no longer needed as per the issue reported.

First PR in this repository. Hoping to contribute to more! If there are any issues, let me know.

Commits
-------

74117fb removed unnecessary code

Author: nicolas-grekas

src/Flex.php

@@ -307,17 +307,6 @@ public function configureInstaller()
         return $backtrace;
     }
 
-    public function lockPlatform()
-    {
-        if (!$this->downloader->isEnabled()) {
-            return; // "symfony/flex" not found in the root composer.json - don't create the symfony.lock file
-        }
-
-        $this->lock->set('php', [
-            'version' => $this->config->get('platform')['php'] ?? (\PHP_MAJOR_VERSION.'.'.\PHP_MINOR_VERSION),
-        ]);
-    }
-
     public function configureProject(Event $event)
     {
         if (!$this->downloader->isEnabled()) {
@@ -700,40 +689,6 @@ public function onFileDownload(PreFileDownloadEvent $event)
         }
     }
 
-    public function updateAutoloadFile()
-    {
-        if (!$platform = $this->lock->get('php')['version'] ?? null) {
-            return;
-        }
-
-        $autoloadFile = $this->config->get('vendor-dir').'/autoload.php';
-
-        if (!file_exists($autoloadFile)) {
-            return;
-        }
-
-        $code = file_get_contents($autoloadFile);
-        $code = substr($code, \strlen("<?php\n"));
-
-        if (false !== strpos($code, 'PHP_VERSION_ID')) {
-            return;
-        }
-
-        $platform = preg_replace('/[^-+.~_\w]/', '', $platform);
-        $version = sprintf('%d%02d00', ...explode('.', $platform.'.0'));
-
-        file_put_contents($autoloadFile, <<<EOPHP
-<?php
-
-if (PHP_VERSION_ID < $version) {
-    echo sprintf("Fatal Error: composer.lock was created for PHP version $platform or higher but the current PHP version is %d.%d.%s.\\n", PHP_MAJOR_VERSION, PHP_MINOR_VERSION, PHP_RELEASE_VERSION);
-    exit(1);
-}
-$code
-EOPHP
-        );
-    }
-
     /**
      * @return Recipe[]
      */
@@ -1010,14 +965,13 @@ public static function getSubscribedEvents(): array
             ScriptEvents::POST_INSTALL_CMD => 'install',
             ScriptEvents::PRE_UPDATE_CMD => 'configureInstaller',
             ScriptEvents::POST_UPDATE_CMD => 'update',
-            ScriptEvents::POST_AUTOLOAD_DUMP => 'updateAutoloadFile',
             'auto-scripts' => 'executeAutoScripts',
         ];
 
         if (version_compare('2.0.0', PluginInterface::PLUGIN_API_VERSION, '>')) {
             $events += [
                 InstallerEvents::PRE_DEPENDENCIES_SOLVING => [['populateProvidersCacheDir', \PHP_INT_MAX]],
-                InstallerEvents::POST_DEPENDENCIES_SOLVING => [['populateFilesCacheDir', \PHP_INT_MAX], ['lockPlatform']],
+                InstallerEvents::POST_DEPENDENCIES_SOLVING => [['populateFilesCacheDir', \PHP_INT_MAX]],
                 PackageEvents::PRE_PACKAGE_INSTALL => [['populateFilesCacheDir', ~\PHP_INT_MAX]],
                 PackageEvents::PRE_PACKAGE_UPDATE => [['populateFilesCacheDir', ~\PHP_INT_MAX]],
                 PluginEvents::PRE_FILE_DOWNLOAD => 'onFileDownload',