Remove CTE flag from array_diff_ukey(), which was added by mistake

This was accidentally added in phpGH-7780, but since it takes a callable
argument, this flag is useless on this function.

Closes phpGH-10859.

Author: mvorisek

ext/standard/basic_functions.stub.php

@@ -1804,7 +1804,6 @@ function array_diff_key(array $array, array ...$arrays): array {}
 
 /**
  * @param array|callable $rest
- * @compile-time-eval
  * @refcount 1
  */
 function array_diff_ukey(array $array, ...$rest): array {}