no more useless msg in log

tools/plot-timing.sh

@@ -17,7 +17,7 @@ fi
 # echo "plot timing $sequence" >> WS/log
 
 count=$( grep $sequence WS/mp4.timing | wc -l )
-echo "$count samples for $sequence" | tee -a WS/log
+echo "$count samples for $sequence"
 
 grep $sequence WS/mp4.timing | tail -4000 | awk 		\
 				-v nbframes=$NBFRAMES		\