wifi: remove orphaned wl3501 driver

Planet WL3501 is another PCMCIA driver for pre-802.11b interfaces
(2Mbit/s) with incomplete CFG80211 support.

This was marked as orphaned in 2017 but has been unmaintained
for a long time before that.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>

MAINTAINERS

@@ -23236,11 +23236,6 @@ M:	Miloslav Trmac <mitr@volny.cz>
 S:	Maintained
 F:	drivers/input/misc/wistron_btns.c
 
-WL3501 WIRELESS PCMCIA CARD DRIVER
-L:	linux-wireless@vger.kernel.org
-S:	Orphan
-F:	drivers/net/wireless/legacy/wl3501*
-
 WMI BINARY MOF DRIVER
 M:	Armin Wolf <W_Armin@gmx.de>
 R:	Thomas Weißschuh <linux@weissschuh.net>

drivers/net/wireless/legacy/Kconfig

-config PCMCIA_WL3501
-	tristate "Planet WL3501 PCMCIA cards"
-	depends on CFG80211 && PCMCIA
-	select WIRELESS_EXT
-	select WEXT_SPY
-	help
-	  A driver for WL3501 PCMCIA 802.11 wireless cards made by Planet.
-	  It has basic support for Linux wireless extensions and initial
-	  micro support for ethtool.
-
 config USB_NET_RNDIS_WLAN
 	tristate "Wireless RNDIS USB support"
 	depends on USB

drivers/net/wireless/legacy/Makefile

-# 16-bit wireless PCMCIA client drivers
-obj-$(CONFIG_PCMCIA_WL3501)	+= wl3501_cs.o
-
 obj-$(CONFIG_USB_NET_RNDIS_WLAN)	+= rndis_wlan.o