diff --git a/src/Util/Formatting.php b/src/Util/Formatting.php
index 7c672562b7..a650e0e446 100644
--- a/src/Util/Formatting.php
+++ b/src/Util/Formatting.php
@@ -31,7 +31,6 @@
 namespace App\Util;
 
 use const DIRECTORY_SEPARATOR;
-use Functional;
 use Functional as F;
 use InvalidArgumentException;
 use Symfony\Component\Config\Definition\Exception\Exception;
@@ -121,24 +120,14 @@ abstract class Formatting
             });
     }
 
-    /**
-     * @param string $str
-     *
-     * @return string
-     */
     public static function camelCaseToSnakeCase(string $str): string
     {
         return strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $str));
     }
 
-    /**
-     * @param string $str
-     *
-     * @return string
-     */
     public static function snakeCaseToCamelCase(string $str): string
     {
-        return implode('', F\map(preg_split('/[\b_]/', $str), Functional::arity('ucfirst', 1)));
+        return implode('', F\map(preg_split('/[\b_]/', $str), F\ary('ucfirst', 1)));
     }
 
     /**
@@ -157,7 +146,7 @@ abstract class Formatting
         } elseif (is_array($in)) {
             $indent = str_repeat(' ', $count * $level);
             return implode("\n", F\map(F\select($in,
-                Functional::arity(function ($s) {
+                F\ary(function ($s) {
                     return $s != '';
                 }, 1)),
                 function ($val) use ($indent) {
diff --git a/src/Util/Functional.php b/src/Util/Functional.php
index 3a525229c5..2d5fc87fe7 100644
--- a/src/Util/Functional.php
+++ b/src/Util/Functional.php
@@ -30,26 +30,6 @@
 
 namespace App\Util;
 
-use Functional as F;
-
 abstract class Functional
 {
-    /**
-     * Call $func with only abs($count) arguments, taken either from the
-     * left or right depending on the sign
-     *
-     * @param callable $func
-     * @param int      $count
-     *
-     * @return callable
-     */
-    public static function arity(callable $func, int $count): callable
-    {
-        return function (...$args) use ($func, $count) {
-            if ($count > 0) {
-                return call_user_func_array($func, F\take_left($args, $count));
-            }
-            return call_user_func_array($func, F\take_right($args, -$count));
-        };
-    }
 }