refactor: remove else

Author: kenjis

system/Autoloader/Autoloader.php

@@ -373,16 +373,15 @@ private function loadComposerNamespaces(ClassLoader $composer, array $composerPa
             unset($namespacePaths['CodeIgniter\\']);
         }
 
-        if (method_exists(InstalledVersions::class, 'getAllRawData')) {
-            // This method requires Composer 2.0.14 or later.
-            $packageList = InstalledVersions::getAllRawData()[0]['versions'];
-        } else {
+        if (! method_exists(InstalledVersions::class, 'getAllRawData')) {
             throw new RuntimeException(
                 'Your Composer version is too old.'
                 . ' Please update Composer (run `composer self-update`) to v2.0.14 or later'
                 . ' and remove your vendor/ directory, and run `composer update`.'
             );
         }
+        // This method requires Composer 2.0.14 or later.
+        $packageList = InstalledVersions::getAllRawData()[0]['versions'];
 
         // Check config for $composerPackages.
         $only    = $composerPackages['only'] ?? [];