[doc] Drop empty \brief, \date, and \author lines

Applications/DataExplorer/VtkVis/VtkAppendArrayFilter.h

Applications/Utils/MeshEdit/MoveMesh.cpp

...ies/CapillaryPressureSaturation/SaturationBrooksCorey.cpp

...rties/CapillaryPressureSaturation/SaturationBrooksCorey.h

...ies/CapillaryPressureSaturation/SaturationExponential.cpp

...rties/CapillaryPressureSaturation/SaturationExponential.h

...ies/CapillaryPressureSaturation/SaturationLiakopoulos.cpp

...rties/CapillaryPressureSaturation/SaturationLiakopoulos.h

MaterialLib/MPL/Properties/ClausiusClapeyron.cpp

MaterialLib/MPL/Properties/IdealGasLaw.cpp

MaterialLib/MPL/Properties/IdealGasLaw.h

MaterialLib/MPL/Properties/IdealGasLawBinaryMixture.cpp

MaterialLib/MPL/Properties/IdealGasLawBinaryMixture.h

MaterialLib/MPL/Properties/PermeabilityOrthotropicPowerLaw.h

...PL/Properties/RelativePermeability/RelPermBrooksCorey.cpp

.../MPL/Properties/RelativePermeability/RelPermBrooksCorey.h

...elativePermeability/RelPermBrooksCoreyNonwettingPhase.cpp

.../RelativePermeability/RelPermBrooksCoreyNonwettingPhase.h

...PL/Properties/RelativePermeability/RelPermLiakopoulos.cpp

.../MPL/Properties/RelativePermeability/RelPermLiakopoulos.h