network: skip calling setup-ip from network-manager-prepare-conf-dir

The setup-ip script requires extra parameters (action and interface) not
only env variables. Since NetworkManager service is already ordered
after qubes-network-uplink.service, the setup-ip already did its job at
this time - remove the call instead of fixing it.

network/network-manager-prepare-conf-dir

@@ -20,18 +20,4 @@ unmanaged_devices=mac:fe:ff:ff:ff:ff:ff
 sed -r -i -e "s/^#?unmanaged-devices=.*/unmanaged-devices=$unmanaged_devices/" /etc/NetworkManager/NetworkManager.conf
 sed -r -i -e "s/^#?plugins=.*/plugins=keyfile/" /etc/NetworkManager/NetworkManager.conf
 
-# setup uplink configuration if applicable - this needs to be done before
-# starting NetworkManager, otherwise it will try default DHCP configuration
-# first and only after a timeout fallback to static one - introducing delay in
-# network connectivity
-ACTION="add"
-INTERFACE="$(get_qubes_managed_iface)"
-export ACTION
-export INTERFACE
-if qubesdb-read /qubes-ip >/dev/null 2>/dev/null &&
-        [ -e "/sys/class/net/$INTERFACE" ] &&
-        [ ! -r "/etc/NetworkManager/system-connections/qubes-uplink-$INTERFACE" ]; then
-    /usr/lib/qubes/setup-ip
-fi
-
 exit 0