[RFKILL]: Remove IRDA

As Dmitry pointed out earlier, rfkill-input.c
doesn't support irda because there are no users
and we shouldn't add unrequired KEY_ defines.

However, RFKILL_TYPE_IRDA was defined in the
rfkill.h header file and would confuse people
about whether it is implemented or not.

This patch removes IRDA support completely,
so it can be added whenever a driver wants the
feature.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rfkill/Kconfig b/net/rfkill/Kconfig
index 8b31759..d28a6d9 100644
--- a/net/rfkill/Kconfig
+++ b/net/rfkill/Kconfig
@@ -5,7 +5,7 @@
 	tristate "RF switch subsystem support"
 	help
 	  Say Y here if you want to have control over RF switches
-	  found on many WiFi, Bluetooth and IRDA cards.
+	  found on many WiFi and Bluetooth cards.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called rfkill.