removing trailing comma in function call, not detectable by php-cs-fi…

…xer re: PHP-CS-Fixer/PHP-CS-Fixer#4135

src/Psalm/Internal/Provider/ReturnTypeProvider/ArrayFilterReturnTypeProvider.php

@@ -84,7 +84,7 @@ public static function getFunctionReturnType(
             ) {
                 return new Type\Union([
                     new Type\Atomic\TList(
-                        $inner_type,
+                        $inner_type
                     ),
                 ]);
             }