gnu: rfkill: Mark as superseded by util-linux.

* gnu/packages/linux.scm (rfkill)[properties]: New field, superseded by
util-linux.
* gnu/system.scm (%base-packages): Remove rfkill.

gnu/packages/linux.scm

@@ -2643,7 +2643,9 @@ Command Translation} (SAT) are also supported.")
 which is used to enable and disable wireless networking devices, typically
 WLAN, Bluetooth and mobile broadband.")
     (license (license:non-copyleft "file://COPYING"
-                                   "See COPYING in the distribution."))))
+                                   "See COPYING in the distribution."))
+    ;; rfkill is part of util-linux as of 2.31.
+    (properties `((superseded . ,util-linux)))))
 
 (define-public acpi
   (package

gnu/system.scm

@@ -516,7 +516,7 @@ explicitly appear in OS."
 
          ;; wireless-tools is deprecated in favor of iw, but it's still what
          ;; many people are familiar with, so keep it around.
-         iw wireless-tools rfkill
+         iw wireless-tools
 
          iproute
          net-tools                        ; XXX: remove when Inetutils suffices