Remove Pure attribute from array_intersect_uassoc()

As this function takes a callable it should not be marked as pure,
this appears to be the convention based on all the other array user
intersect/diff functions.

Author: cs278

standard/standard_9.php

@@ -445,7 +445,6 @@ function array_intersect_uassoc(
  * array1 that are present in all the arguments.
  * @meta
  */
-#[Pure]
 function array_uintersect_uassoc(
     array $array,
     #[PhpStormStubsElementAvailable(from: '5.3', to: '7.4')] array $array2,