remove unused constants from the previous HI method

Author: Yujie Xu

src/EnergyPlus/HeatBalanceSurfaceManager.cc

@@ -5617,16 +5617,6 @@ void CalcThermalResilience(EnergyPlusData &state)
     // The heat index equation set is fit to Fahrenheit units, so the zone air temperature values are first convert to F,
     // then heat index is calculated and converted back to C.
     if (state.dataHeatBalSurfMgr->reportVarHeatIndex || state.dataOutRptTab->displayThermalResilienceSummary) {
-        // Constance for heat index regression equation of Rothfusz.
-        Real64 constexpr c1 = -42.379;
-        Real64 constexpr c2 = 2.04901523;
-        Real64 constexpr c3 = 10.14333127;
-        Real64 constexpr c4 = -.22475541;
-        Real64 constexpr c5 = -.00683783;
-        Real64 constexpr c6 = -.05481717;
-        Real64 constexpr c7 = .00122874;
-        Real64 constexpr c8 = .00085282;
-        Real64 constexpr c9 = -.00000199;
         for (int ZoneNum = 1; ZoneNum <= state.dataGlobal->NumOfZones; ++ZoneNum) {
             Real64 const ZoneT = state.dataZoneTempPredictorCorrector->zoneHeatBalance(ZoneNum).ZTAV;
             Real64 const ZoneW = state.dataZoneTempPredictorCorrector->zoneHeatBalance(ZoneNum).airHumRatAvg;