(trx0roll.c:746) Bug#55227 Fix compiler warnings in innodb with gcc 4.6

storage/innobase/trx/trx0roll.c

@@ -743,11 +743,8 @@ trx_undo_arr_remove_info(
 	undo_no_t	undo_no)/*!< in: undo number */
 {
 	trx_undo_inf_t*	cell;
-	ulint		n_used;
 	ulint		i;
 
-	n_used = arr->n_used;
-
 	for (i = 0;; i++) {
 		cell = trx_undo_arr_get_nth_info(arr, i);