powerpc: mpc8xx: delete an unused source file

References to the wireless keyboard should also be removed
from README.console.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>

arch/powerpc/cpu/mpc8xx/wlkbd.c

-/*
- * (C) Copyright 2000
- * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <config.h>
-
-#ifdef CONFIG_WL_4PPM_KEYBOARD
-
-/* WIP: Wireless keyboard on SMC
- */
-int	drv_wlkbd_init (void)
-{
-    return 0 ;
-}
-
-#endif	/* CONFIG_WL_4PPM_KEYBOARD */

doc/README.console

@@ -25,7 +25,7 @@ stdout or stderr) to any device you see in that list simply by
 assigning its name to the corresponding environment variable. For
 example:
 
-    setenv stdin wl_kbd		<- To use the wireless keyboard
+    setenv stdin serial		<- To use the serial input
     setenv stdout video		<- To use the video console
 
 Do a simple "saveenv" to save the console settings in the environment