Removed old note

ampel-firmware/co2_sensor.cpp

@@ -86,7 +86,6 @@ namespace sensor {
       stable_measurements++;
       Serial.print(F("Number of stable measurements : "));
       Serial.println(stable_measurements);
-      //NOTE: Hue could change from blue or red to green over 60 measurements.
       waiting_color = color::green;
     } else {
       stable_measurements = 0;