Remove yacc/lex output files from CVS repository.

src/pl/plpgsql/src/y.tab.h

-typedef union {
-	int32			ival;
-	char			*str;
-	struct {
-	    char *name;
-	    int  lineno;
-	}			varname;
-	struct {
-	    int  nalloc;
-	    int	 nused;
-	    int	 *dtnums;
-	}			dtlist;
-	struct {
-	    int  reverse;
-	    PLpgSQL_expr *expr;
-	}			forilow;
-	struct {
-	    char *label;
-	    int  n_initvars;
-	    int  *initvarnos;
-	}			declhdr;
-	PLpgSQL_type		*dtype;
-	PLpgSQL_var		*var;
-	PLpgSQL_row		*row;
-	PLpgSQL_rec		*rec;
-	PLpgSQL_recfield	*recfield;
-	PLpgSQL_trigarg		*trigarg;
-	PLpgSQL_expr		*expr;
-	PLpgSQL_stmt		*stmt;
-	PLpgSQL_stmts		*stmts;
-	PLpgSQL_stmt_block	*program;
-	PLpgSQL_nsitem		*nsitem;
-} YYSTYPE;
-#define	K_ALIAS	258
-#define	K_ASSIGN	259
-#define	K_BEGIN	260
-#define	K_CONSTANT	261
-#define	K_DEBUG	262
-#define	K_DECLARE	263
-#define	K_DEFAULT	264
-#define	K_DOTDOT	265
-#define	K_ELSE	266
-#define	K_END	267
-#define	K_EXCEPTION	268
-#define	K_EXIT	269
-#define	K_FOR	270
-#define	K_FROM	271
-#define	K_IF	272
-#define	K_IN	273
-#define	K_INTO	274
-#define	K_LOOP	275
-#define	K_NOT	276
-#define	K_NOTICE	277
-#define	K_NULL	278
-#define	K_PERFORM	279
-#define	K_RAISE	280
-#define	K_RECORD	281
-#define	K_RENAME	282
-#define	K_RETURN	283
-#define	K_REVERSE	284
-#define	K_SELECT	285
-#define	K_THEN	286
-#define	K_TO	287
-#define	K_TYPE	288
-#define	K_WHEN	289
-#define	K_WHILE	290
-#define	T_FUNCTION	291
-#define	T_TRIGGER	292
-#define	T_CHAR	293
-#define	T_BPCHAR	294
-#define	T_VARCHAR	295
-#define	T_LABEL	296
-#define	T_STRING	297
-#define	T_VARIABLE	298
-#define	T_ROW	299
-#define	T_ROWTYPE	300
-#define	T_RECORD	301
-#define	T_RECFIELD	302
-#define	T_TGARGV	303
-#define	T_DTYPE	304
-#define	T_WORD	305
-#define	T_NUMBER	306
-#define	T_ERROR	307
-#define	O_OPTION	308
-#define	O_DUMP	309
-
-
-extern YYSTYPE yylval;