Correct a comment

storage/innobase/include/trx0rec.h

@@ -189,9 +189,7 @@ trx_undo_report_row_operation(
 					index; NULL if insert */
 	const ulint*	offsets,	/*!< in: rec_get_offsets(rec) */
 	roll_ptr_t*	roll_ptr)	/*!< out: rollback pointer to the
-					inserted undo log record,
-					0 if BTR_NO_UNDO_LOG
-					flag was specified */
+					inserted undo log record */
 	MY_ATTRIBUTE((nonnull(1,2,8), warn_unused_result));
 
 /** status bit used for trx_undo_prev_version_build() */

storage/innobase/trx/trx0rec.cc

@@ -1893,9 +1893,7 @@ trx_undo_report_row_operation(
 					index; NULL if insert */
 	const ulint*	offsets,	/*!< in: rec_get_offsets(rec) */
 	roll_ptr_t*	roll_ptr)	/*!< out: rollback pointer to the
-					inserted undo log record,
-					0 if BTR_NO_UNDO_LOG
-					flag was specified */
+					inserted undo log record */
 {
 	trx_t*		trx;
 	ulint		page_no;