Correct the `@param` type for the `$query` arg for `remove_query_arg()`.

See #30224.


git-svn-id: https://develop.svn.wordpress.org/trunk@30191 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -803,7 +803,7 @@ function add_query_arg() {
  * @since 1.5.0
  *
  * @param string|array $key   Query key or keys to remove.
- * @param bool         $query Optional. When false uses the $_SERVER value. Default false.
+ * @param bool|string  $query Optional. When false uses the $_SERVER value. Default false.
  * @return string New URL query string.
  */
 function remove_query_arg( $key, $query = false ) {