wifi: ti: remove obsolete lines in the Makefile

Commit 06463f6e ("wifi: wl1251: drop support for platform data")
removes TI WiLink platform data, but leaves some dead lines in the
Makefile.

Remove these obsolete lines in the Makefile.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221209095937.17773-1-lukas.bulwahn@gmail.com

drivers/net/wireless/ti/Makefile

@@ -3,6 +3,3 @@ obj-$(CONFIG_WLCORE)			+= wlcore/
 obj-$(CONFIG_WL12XX)			+= wl12xx/
 obj-$(CONFIG_WL1251)			+= wl1251/
 obj-$(CONFIG_WL18XX)			+= wl18xx/
-
-# small builtin driver bit
-obj-$(CONFIG_WILINK_PLATFORM_DATA)	+= wilink_platform_data.o