tweaks: hard-bind ASCII DEL in a slightly more economical way

And in the bargain get rid of a duplicate help-text entry for
either "Del" or "Bsp".

src/browser.c

@@ -462,7 +462,6 @@ functionptrtype parse_browser_input(int *kbinput)
 {
 	if (!meta_key) {
 		switch (*kbinput) {
-			case DEL_CODE:
 			case '-':
 				return do_page_up;
 			case ' ':

src/global.c

@@ -1084,11 +1084,6 @@ void shortcut_init(void)
 	add_to_sclist(MMOST, "Sh-Del", SHIFT_DELETE, do_backspace, 0);
 	add_to_sclist(MMOST, "^D", 0, do_delete, 0);
 	add_to_sclist(MMOST, "Del", 0, do_delete, 0);
-	/* Make ASCII DEL do a delete when requested, otherwise a backspace. */
-	if (ISSET(REBIND_DELETE))
-		add_to_sclist(MMOST, "Del", DEL_CODE, do_delete, 0);
-	else
-		add_to_sclist(MMOST & ~MBROWSER, "Bsp", DEL_CODE, do_backspace, 0);
 	add_to_sclist(MMOST, "^I", 0, do_tab, 0);
 	add_to_sclist(MMOST, "Tab", TAB_CODE, do_tab, 0);
 	add_to_sclist((MMOST|MBROWSER) & ~MFINDINHELP, "^G", 0, do_help_void, 0);

src/help.c

@@ -567,7 +567,6 @@ functionptrtype parse_help_input(int *kbinput)
 {
 	if (!meta_key) {
 		switch (*kbinput) {
-			case DEL_CODE:
 			case '-':
 				return do_page_up;
 			case ' ':

src/winio.c

@@ -725,6 +725,7 @@ int parse_kbinput(WINDOW *win)
 		case KEY_C3:    /* PageDown (3) on keypad with NumLock off. */
 			return KEY_NPAGE;
 		/* When requested, swap meanings of keycodes for <Bsp> and <Del>. */
+		case DEL_CODE:
 		case KEY_BACKSPACE:
 			return (ISSET(REBIND_DELETE) ? KEY_DC : KEY_BACKSPACE);
 		case KEY_DC: