refactor(ProjectDetection): Simplify array_filter call

coder_sniffer/DrupalPractice/Project.php

@@ -95,12 +95,7 @@ class Project
             }
 
             // Filter out directories.
-            $infoFiles = array_filter(
-                $infoFiles,
-                function ($fileName) {
-                    return is_file($fileName);
-                }
-            );
+            $infoFiles = array_filter($infoFiles, 'is_file');
 
             // Go one directory up if we do not find an info file here.
             $dir = dirname($dir);