remove unused method

sql/group_by_handler.h

@@ -118,9 +118,6 @@ class group_by_handler
   /* End scanning */
   virtual int end_scan()=0;
 
-  /* Information for optimizer (used by EXPLAIN) */
-  virtual int info(uint flag, ha_statistics *stats)= 0;
-
   /* Function that calls the above scan functions */
   int execute(JOIN *join);
 

storage/sequence/sequence.cc

@@ -377,7 +377,6 @@ class ha_seq_group_by_handler: public group_by_handler
   int init_scan() { first_row= 1 ; return 0; }
   int next_row();
   int end_scan()  { return 0; }
-  int info(uint flag, ha_statistics *stats);
 };
 
 static group_by_handler *
@@ -449,14 +448,6 @@ bool ha_seq_group_by_handler::init(TABLE *temporary_table, Item *having_arg,
 }
 
 
-int ha_seq_group_by_handler::info(uint flag, ha_statistics *stats)
-{
-  bzero(stats, sizeof(*stats));
-  /* We only return one records for a SUM(*) without a group by */
-  stats->records= 1;
-  return 0;
-}
-
 int ha_seq_group_by_handler::next_row()
 {
   List_iterator_fast<Item> it(*fields);