[fronius] Remove stale i18n keys of the moved battery settings refresh interval

Signed-off-by: Christian Jonak-Möchel <christian@jonak.org>

Author: joni1993

bundles/org.openhab.binding.fronius/src/main/resources/OH-INF/i18n/fronius.properties

@@ -188,11 +188,6 @@ thing-type.fronius.battery.channel.calibration.label = Calibration
 thing-type.fronius.battery.channel.socMax.label = SoC Maximum
 thing-type.fronius.battery.channel.socMin.label = SoC Minimum
 
-# thing types config
-
-thing-type.config.fronius.powerinverter.batterySettingsRefreshInterval.label = Battery Settings Refresh Interval
-thing-type.config.fronius.powerinverter.batterySettingsRefreshInterval.description = Specifies the interval in minutes at which the battery settings channels are read from the inverter's config API. Reading them requires a login, therefore the interval should be kept high.
-
 # actions
 
 actions.from.label = Begin Timestamp