kconfig: menuconfig: remove OLD_NCURSES macro

This code has been here for more than 20 years. The bug in the old days
no longer matters.

Signed-off-by: Masahiro Yamada <[e-mail]>

scripts/kconfig/lxdialog/dialog.h

···
 #endif
 #include <ncurses.h>
 
-/*
- * Colors in ncurses 1.9.9e do not work properly since foreground and
- * background colors are OR'd rather than separately masked.  This version
- * of dialog was hacked to work with ncurses 1.9.9e, making it incompatible
- * with standard curses.  The simplest fix (to make this work with standard
- * curses) uses the wbkgdset() function, not used in the original hack.
- * Turn it off if we're building with 1.9.9e, since it just confuses things.
- */
-#if defined(NCURSES_VERSION) && defined(_NEED_WRAP) && !defined(GCC_PRINTFLIKE)
-#define OLD_NCURSES 1
-#undef  wbkgdset
-#define wbkgdset(w,p)		/*nothing */
-#else
-#define OLD_NCURSES 0
-#endif
-
 #define TR(params) _tracef params
 
 #define KEY_ESC 27

scripts/kconfig/lxdialog/menubox.c

···
 	/* Clear 'residue' of last item */
 	wattrset(win, dlg.menubox.atr);
 	wmove(win, line_y, 0);
-#if OLD_NCURSES
-	{
-		int i;
-		for (i = 0; i < menu_width; i++)
-			waddch(win, ' ');
-	}
-#else
 	wclrtoeol(win);
-#endif
 	wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
 	mvwaddstr(win, line_y, item_x, menu_item);
 	if (hotkey) {

scripts/kconfig/lxdialog/textbox.c

···
 	waddnstr(win, line, MIN(strlen(line), width - 2));
 
 	/* Clear 'residue' of previous line */
-#if OLD_NCURSES
-	{
-		int x = getcurx(win);
-		int i;
-		for (i = 0; i < width - x; i++)
-			waddch(win, ' ');
-	}
-#else
 	wclrtoeol(win);
-#endif
 }
 
 /*