Remove the differentiation between currentReplicas==1 and not

Signed-off-by: Gede Wahyu <tokekbesi@gmail.com>

gateway/handlers/alerthandler.go

@@ -100,14 +100,10 @@ func CalculateReplicas(status string, currentReplicas uint64, maxReplicas uint64
 	step := uint64((float64(maxReplicas) / 100) * float64(scalingFactor))
 
 	if status == "firing" && step > 0 {
-		if currentReplicas == 1 {
-			newReplicas = step
+		if currentReplicas+step > maxReplicas {
+			newReplicas = maxReplicas
 		} else {
-			if currentReplicas+step > maxReplicas {
-				newReplicas = maxReplicas
-			} else {
-				newReplicas = currentReplicas + step
-			}
+			newReplicas = currentReplicas + step
 		}
 	} else { // Resolved event.
 		newReplicas = minReplicas