Don't include wireless tools in containers

nixos/modules/tasks/network-interfaces.nix

···
         pkgs.iproute
         pkgs.iputils
         pkgs.nettools
-        pkgs.wirelesstools
+        pkgs.openresolv
+      ]
+      ++ optionals (!config.boot.isContainer) [
+        pkgs.wirelesstools # FIXME: obsolete?
         pkgs.iw
         pkgs.rfkill
-        pkgs.openresolv
-      ] ++ bridgeStp;
+      ]
+      ++ bridgeStp;
 
     systemd.targets."network-interfaces" =
       { description = "All Network Interfaces";