Use the sqlite3ParserAddCleanup() mechanism to ensure that the AggInfo

structure associated with an aggregate query is deallocated, for a performance
increase and size reduction.

FossilOrigin-Name: 7a1399671fa10c64d5358cc4d364d24c643fe9dd8da923356462267ee7962f61

src/sqliteInt.h

@@ -2591,7 +2591,6 @@ struct AggInfo {
   } *aFunc;
   int nFunc;              /* Number of entries in aFunc[] */
   u32 selId;              /* Select to which this AggInfo belongs */
-  AggInfo *pNext;         /* Next in list of them all */
 };
 
 /*
@@ -3427,7 +3426,6 @@ struct Parse {
   Parse *pToplevel;    /* Parse structure for main program (or NULL) */
   Table *pTriggerTab;  /* Table triggers are being coded for */
   Parse *pParentParse; /* Parent parser if this parser is nested */
-  AggInfo *pAggList;   /* List of all AggInfo objects */
   union {
     int addrCrTab;         /* Address of OP_CreateBtree on CREATE TABLE */
     Returning *pReturning; /* The RETURNING clause */