branches/zip: ha_innobase::add_index(): Remove a remark about row0mysql.c

in a comment about latching the data dictionary.  The data dictionary may
be latched elsewhere too.

handler/ha_innodb.cc

@@ -8405,8 +8405,7 @@ ha_innobase::add_index(
 		heap, num_of_idx * sizeof *index);
 
 	/* Latch the InnoDB data dictionary exclusively so that no deadlocks
-	or lock waits can happen in it during an index create operation.
-	Drop table etc. do this latching in row0mysql.c. */
+	or lock waits can happen in it during an index create operation. */
 
 	if (UNIV_LIKELY(!dict_locked)) {
 	  	row_mysql_lock_data_dictionary(trx);