ISS: remove hardcoded value

schedule_iss.sh

@@ -10,8 +10,6 @@ fi
 . "$HOME/.noaa.conf"
 . "$NOAA_HOME/common.sh"
 
-SAT_MIN_ELEV=10
-
 PREDICTION_START=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" | head -1)
 PREDICTION_END=$(/usr/bin/predict -t "${NOAA_HOME}"/predict/amateur.tle -p "${1}" | tail -1)