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network-interfaces.nix: dead code removal 

`wlanDeviceUdevScript` is not used below in the text
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volth 2018-04-04 13:45:49 +00:00 committed by GitHub
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commit b9e01e64b7
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nixos/modules/tasks/network-interfaces.nix
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@ -62,35 +62,6 @@ let
then mapAttrsToList (n: v: v//{_iName=n;}) (filterAttrs (n: _: n==device) interfaces) ++ mapAttrsToList (n: v: v//{_iName=n;}) (filterAttrs (n: _: n!=device) interfaces)
else mapAttrsToList (n: v: v // {_iName = n;}) interfaces;
# udev script that configures a physical wlan device and adds virtual interfaces
wlanDeviceUdevScript = device: interfaceList: pkgs.writeScript "wlan-${device}-udev-script" ''
#!${pkgs.runtimeShell}
# Change the wireless phy device to a predictable name.
if [ -e "/sys/class/net/${device}/phy80211/name" ]; then
${pkgs.iw}/bin/iw phy `${pkgs.coreutils}/bin/cat /sys/class/net/${device}/phy80211/name` set name ${device} || true
fi
# Crate new, virtual interfaces and configure them at the same time
${flip concatMapStrings (drop 1 interfaceList) (i: ''
${pkgs.iw}/bin/iw dev ${device} interface add ${i._iName} type ${i.type} \
${optionalString (i.type == "mesh" && i.meshID != null) "mesh_id ${i.meshID}"} \
${optionalString (i.type == "monitor" && i.flags != null) "flags ${i.flags}"} \
${optionalString (i.type == "managed" && i.fourAddr != null) "4addr ${if i.fourAddr then "on" else "off"}"} \
${optionalString (i.mac != null) "addr ${i.mac}"}
'')}
# Reconfigure and rename the default interface that already exists
${flip concatMapStrings (take 1 interfaceList) (i: ''
${pkgs.iw}/bin/iw dev ${device} set type ${i.type}
${optionalString (i.type == "mesh" && i.meshID != null) "${pkgs.iw}/bin/iw dev ${device} set meshid ${i.meshID}"}
${optionalString (i.type == "monitor" && i.flags != null) "${pkgs.iw}/bin/iw dev ${device} set monitor ${i.flags}"}
${optionalString (i.type == "managed" && i.fourAddr != null) "${pkgs.iw}/bin/iw dev ${device} set 4addr ${if i.fourAddr then "on" else "off"}"}
${optionalString (i.mac != null) "${pkgs.iproute}/bin/ip link set dev ${device} address ${i.mac}"}
${optionalString (device != i._iName) "${pkgs.iproute}/bin/ip link set dev ${device} name ${i._iName}"}
'')}
'';
# We must escape interfaces due to the systemd interpretation
subsystemDevice = interface:
"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";