sqm-scripts: quiet the hotplug script (supress debugging output)

The hotplug script for sqm-scripts had debug logging enabled, since that
is not needed for normal use, this commit silences the hotplug script
again.

Signed-off-by: Sebastian Moeller <moeller0@gmx.de>

net/sqm-scripts/files/etc/hotplug.d/iface/11-sqm

@@ -1,7 +1,8 @@
 #!/bin/sh
 
 # teach SQM to re-enable itself when an interface re-appears
-logger -t SQM -s "hotplug on interface: ${DEVICE} action: ${ACTION}"
+#echo "${IFACE} does currently not exist, not even trying starting SQM on nothing." > /dev/kmsg
+#logger -t SQM -s "hotplug on interface: ${DEVICE} action: ${ACTION}"
 
 [ "$ACTION" = ifup ] && /usr/lib/sqm/run.sh interface ${DEVICE}