[Thermostat] set CurrentThermostatSuggestion from earliest in-effect suggestion (project-chip#71617)

* [Thermostat] set CurrentThermostatSuggestion from earliest in-effect suggestion

* Restyled by clang-format

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Co-authored-by: Restyled.io <commits@restyled.io>

Author: j-ororke

examples/thermostat/thermostat-common/src/thermostat-delegate-impl.cpp

@@ -435,8 +435,7 @@ CHIP_ERROR ThermostatDelegate::ReEvaluateCurrentSuggestion()
     Seconds32 currentMatterEpochTimestamp = Seconds32(currentMatterEpochTimestampInSeconds);
 
     // For the reference thermostat app, we will always choose a suggestion with the earliest effective time.
-    mIndexOfCurrentSuggestion = GetThermostatSuggestionIndexWithEarliestEffectiveTime(currentMatterEpochTimestamp);
-    SetCurrentThermostatSuggestion(mIndexOfCurrentSuggestion);
+    SetCurrentThermostatSuggestion(GetThermostatSuggestionIndexWithEarliestEffectiveTime(currentMatterEpochTimestamp));
 
     DataModel::Nullable<ThermostatSuggestionStructWithOwnedMembers> nullableCurrentThermostatSuggestion;
     GetCurrentThermostatSuggestion(nullableCurrentThermostatSuggestion);