Revert "Fix psalm issues."

This reverts commit 9ad60fe1.

lib/SimpleSAML/Utils/Crypto.php

@@ -49,7 +49,6 @@ class Crypto
 
         // authenticate the ciphertext
         if (self::secureCompare(hash_hmac('sha256', $iv.$msg, substr($key, 64, 64), true), $hmac)) {
-            /** @var string|false $plaintext */
             $plaintext = openssl_decrypt(
                 $msg,
                 'AES-256-CBC',

lib/SimpleSAML/Utils/HTTP.php

@@ -756,7 +756,6 @@ class HTTP
     {
         $cfg = \SimpleSAML_Configuration::getInstance();
         $baseDir = $cfg->getBaseDir();
-        /** @var string|false $cur_path */
         $cur_path = realpath($_SERVER['SCRIPT_FILENAME']);
         // make sure we got a string from realpath()
         $cur_path = is_string($cur_path) ? $cur_path : '';