Remove no-longer-needed inclusions to improve backward compatibility

with older bison versions.

contrib/cube/cubescan.l

@@ -3,18 +3,16 @@
 ** A scanner for EMP-style numeric ranges 
 */
 
-#define YYSTYPE char *
-#define yylval cube_yylval
-
 #include "postgres.h"
 
-#include "cubeparse.h"
 #include "buffer.h"
 
 
-/* flex screws a couple symbols when used with the -P otion; fix those */
+/* flex screws a couple symbols when used with the -P option; fix those */
 #define YY_DECL int cube_yylex YY_PROTO(( void )); \
 int cube_yylex YY_PROTO(( void ))
+#define yylval cube_yylval
+
 
 /* redefined YY_INPUT reads byte-wise from the memory area defined in buffer.c */
 #undef YY_INPUT

contrib/seg/segscan.l

@@ -5,11 +5,10 @@
 
 #include "postgres.h"
 
-#include "segparse.h"
 #include "buffer.h"
 
 
-/* flex screws a couple symbols when used with the -P otion; fix those */
+/* flex screws a couple symbols when used with the -P option; fix those */
 #define YY_DECL int seg_yylex YY_PROTO(( void )); \
 int seg_yylex YY_PROTO(( void ))
 #define yylval seg_yylval

src/interfaces/ecpg/preproc/pgc.l

@@ -12,7 +12,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.100 2002/10/21 13:09:31 meskes Exp $
+ *	  $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.100.2.1 2002/11/07 06:06:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -24,7 +24,6 @@
 #include <errno.h>
 
 #include "extern.h"
-#include "preproc.h"
 
 
 extern YYSTYPE yylval;

src/pl/plpgsql/src/scan.l

@@ -4,7 +4,7 @@
  *			  procedural language
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/scan.l,v 1.23 2002/09/12 00:24:09 momjian Exp $
+ *    $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/scan.l,v 1.23.2.1 2002/11/07 06:06:39 tgl Exp $
  *
  *    This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -37,7 +37,6 @@
  **********************************************************************/
 
 #include "plpgsql.h"
-#include "pl.tab.h"
 
 
 static char	*plpgsql_source;