[THM] Removed the reference temperature

ProcessLib/ThermoHydroMechanics/CreateThermoHydroMechanicsProcess.cpp

@@ -126,14 +126,6 @@ std::unique_ptr<Process> createThermoHydroMechanicsProcess(
         MaterialLib::Solids::createConstitutiveRelations<DisplacementDim>(
             parameters, local_coordinate_system, config);
 
-    // reference temperature
-    auto const& reference_temperature = ParameterLib::findParameter<double>(
-        config,
-        //! \ogs_file_param_special{prj__processes__process__THERMO_HYDRO_MECHANICS__reference_temperature}
-        "reference_temperature", parameters, 1, &mesh);
-    DBUG("Use '{:s}' as reference temperature parameter.",
-         reference_temperature.name);
-
     // Specific body force
     Eigen::Matrix<double, DisplacementDim, 1> specific_body_force;
     {
@@ -169,7 +161,6 @@ std::unique_ptr<Process> createThermoHydroMechanicsProcess(
         std::move(media_map),
         std::move(solid_constitutive_relations),
         initial_stress,
-        reference_temperature,
         specific_body_force};
 
     SecondaryVariableCollection secondary_variables;

ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsProcessData.h

@@ -50,7 +50,6 @@ struct ThermoHydroMechanicsProcessData
     /// representation of length 4 or 6, ParameterLib::Parameter<double>.
     ParameterLib::Parameter<double> const* const initial_stress;
 
-    ParameterLib::Parameter<double> const& reference_temperature;
     /// Specific body forces applied to solid and fluid.
     /// It is usually used to apply gravitational forces.
     /// A vector of displacement dimension's length.