Remove unused TupleHashTableData->entrysize.

Discussion: https://postgr.es/m/7530bd8783b1a78d53a3c70383e38d8da0a5ffe5.camel%40j-davis.com

Author: jeff-davis

src/backend/executor/execGrouping.c

@@ -196,7 +196,6 @@ BuildTupleHashTable(PlanState *parent,
 	hashtable->tab_collations = collations;
 	hashtable->tablecxt = tablecxt;
 	hashtable->tempcxt = tempcxt;
-	hashtable->entrysize = entrysize;
 	hashtable->tableslot = NULL;	/* will be made on first lookup */
 	hashtable->inputslot = NULL;
 	hashtable->in_hash_expr = NULL;

src/include/nodes/execnodes.h

@@ -835,7 +835,6 @@ typedef struct TupleHashTableData
 	Oid		   *tab_collations; /* collations for hash and comparison */
 	MemoryContext tablecxt;		/* memory context containing table */
 	MemoryContext tempcxt;		/* context for function evaluations */
-	Size		entrysize;		/* actual size to make each hash entry */
 	TupleTableSlot *tableslot;	/* slot for referencing table entries */
 	/* The following fields are set transiently for each table search: */
 	TupleTableSlot *inputslot;	/* current input tuple's slot */