Remove the mostly-stubbed-out-anyway support routines for WAL UNDO.

That code is never going to be used in the foreseeable future, and
where it's more than a stub it's making the redo routines harder to
read.

Author: tglsfdc

src/backend/access/gist/gist.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.117 2005/05/17 03:34:18 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.118 2005/06/06 17:01:21 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1732,12 +1732,6 @@ gist_redo(XLogRecPtr lsn, XLogRecord *record)
 	elog(PANIC, "gist_redo: unimplemented");
 }
 
-void
-gist_undo(XLogRecPtr lsn, XLogRecord *record)
-{
-	elog(PANIC, "gist_undo: unimplemented");
-}
-
 void
 gist_desc(char *buf, uint8 xl_info, char *rec)
 {

src/backend/access/hash/hash.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/hash/hash.c,v 1.79 2005/05/11 06:24:51 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/hash/hash.c,v 1.80 2005/06/06 17:01:21 tgl Exp $
  *
  * NOTES
  *	  This file contains only the public interface routines.
@@ -671,12 +671,6 @@ hash_redo(XLogRecPtr lsn, XLogRecord *record)
 	elog(PANIC, "hash_redo: unimplemented");
 }
 
-void
-hash_undo(XLogRecPtr lsn, XLogRecord *record)
-{
-	elog(PANIC, "hash_undo: unimplemented");
-}
-
 void
 hash_desc(char *buf, uint8 xl_info, char *rec)
 {