Remove full speed defaults.

#599, #595, #593.

main/fancontrol.go

@@ -69,21 +69,9 @@ func fanControl(pwmDutyMin int, pin int, tempTarget float32) {
 	})
 	pwmDuty := 0
 
-	tempWhenRampStarted := float32(0.)
 	for {
 		if temp > (tempTarget + hysteresis) {
-			if tempWhenRampStarted < 1. {
-				tempWhenRampStarted = temp
-			}
 			pwmDuty = iMax(iMin(pwmDutyMax, pwmDuty+1), pwmDutyMin)
-			if pwmDuty == pwmDutyMax {
-				// At the maximum duty cycle currently.
-				// Has the temperature increased "substantially" since the ramp-up started?
-				if temp > (tempWhenRampStarted + hysteresis) {
-					// Give up. The fan does not like the PWM control.
-					break
-				}
-			}
 		} else if temp < (tempTarget - hysteresis) {
 			pwmDuty = iMax(pwmDuty-1, 0)
 			if pwmDuty < pwmDutyMin {