MT#18331 Remove unused LOGFILE variable

This variable was used for logging, in an insecure way, but latter
replaced by usage of logger(1). Remove to avoid confusion and false
alarms.

Change-Id: Ib17f0282707e2c91328b38818e65e7c44ea34276

vmnotify.conf

@@ -2,10 +2,7 @@ SERVER="127.0.0.1:5060"
 LOCAL_IP="127.0.0.1"
 FILE_DEBUG="0"
 CONSOLE_DEBUG="0"
-LOGFILE="/tmp/vmnotify.log"
 VERBOSE=""
 SIPSAK=`which sipsak`
 UUIDGEN=`which uuidgen`
 SIPFILE="/etc/ngcp-vmnotify/mwi.sip"
-
-