Merge branch 'PHP-8.5'

* PHP-8.5:
  Revert "Fix GH-20214: PDO::FETCH_DEFAULT unexpected behavior with PDOStatement::setFetchMode (#21434)"

Author: iluuu1994

ext/pdo/pdo_stmt.c

@@ -1628,10 +1628,6 @@ bool pdo_stmt_setup_fetch_mode(pdo_stmt_t *stmt, zend_long mode, uint32_t mode_a
 
 	flags = mode & PDO_FETCH_FLAGS;
 
-	if ((mode & ~PDO_FETCH_FLAGS) == PDO_FETCH_USE_DEFAULT) {
-		mode = stmt->dbh->default_fetch_type | flags;
-	}
-
 	if (!pdo_verify_fetch_mode(stmt->default_fetch_type, mode, mode_arg_num, false)) {
 		return false;
 	}