No need to define the supportedTokenizers, it's in parent

And fix a small php82 warn.

Author: stronk7

moodle/Sniffs/ControlStructures/ControlSignatureSniff.php

@@ -35,7 +35,6 @@ class ControlSignatureSniff extends AbstractPatternSniff {
 
     public function __construct() {
         parent::__construct(true);
-        $this->supportedTokenizers = array('PHP', 'JS');
     }
 
     /** @var array A list of tokenizers this sniff supports. */

moodle/Util/MoodleUtil.php

@@ -88,7 +88,7 @@ protected static function loadCoreComponent(string $moodleRoot): bool {
         if (!isset($CFG->dirroot)) { // No defined, let's start from scratch.
             $CFG = (object) [
                 'dirroot' => $moodleRoot,
-                'libdir' => "${moodleRoot}/lib",
+                'libdir' => "{$moodleRoot}/lib",
                 'admin' => 'admin',
             ];
         }