Further corrections of mismatching struct and btree SizeOf macros.

In this case, correction is to remove now unused fields from struct.
Since these were unused and full of garbage anyway, no version change.

src/include/access/nbtree.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.132 2010/03/19 20:51:30 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.133 2010/03/20 07:49:48 sriggs Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -317,7 +317,6 @@ typedef struct xl_btree_delete
 	RelFileNode node;
 	BlockNumber block;
 	TransactionId latestRemovedXid;
-	int			numItems;		/* number of items in the offset array */
 
 	/* TARGET OFFSET NUMBERS FOLLOW AT THE END */
 } xl_btree_delete;
@@ -363,7 +362,6 @@ typedef struct xl_btree_vacuum
 	RelFileNode node;
 	BlockNumber block;
 	BlockNumber lastBlockVacuumed;
-	int			numItems;		/* number of items in the offset array */
 
 	/* TARGET OFFSET NUMBERS FOLLOW */
 } xl_btree_vacuum;