Fix incorrect mmol conversion of carbsHr

...resulting in 0 or very low carbs_hr values uploaded to Nightscout profile for mmol-users.

**TODO: Evaluate if  daily cr and isf averages should be used to calculate carbsHr instead of the first/"midnight values" as in current code**

Trio/Sources/Services/Network/Nightscout/NightscoutManager.swift

@@ -769,9 +769,6 @@ final class BaseNightscoutManager: NightscoutManager, Injectable {
                    isf > 0, cr > 0
                 {
                     carbsHr = settingsManager.preferences.min5mCarbimpact * 12 / isf * cr
-                    if settingsManager.settings.units == .mmolL {
-                        carbsHr *= GlucoseUnits.exchangeRate
-                    }
                     carbsHr = Decimal(round(Double(carbsHr) * 10.0)) / 10
                 }