rm unnecessary includes

Core/Export/ExportToPython.cpp

Core/Multilayer/DWBADiffuseReflection.cpp

Core/Multilayer/FormFactorDWBA.cpp

Core/Multilayer/FormFactorDWBAPol.cpp

Core/Multilayer/IRoughness.cpp

Core/Multilayer/IRoughness.h

Core/Multilayer/Layer.cpp

Core/Multilayer/LayerInterface.cpp

Core/Multilayer/LayerInterface.h

Core/Multilayer/LayerRoughness.cpp

Core/Multilayer/MultiLayer.cpp

Core/Multilayer/SpecularMatrix.cpp

Core/Particle/ParticleComposition.cpp

Core/Particle/ParticleCoreShell.cpp

Doc/Doxygen/Doxyfile.dirgraphs

GUI/coregui/Models/TransformFromDomain.cpp

Tests/UnitTests/Core/1/MultiLayerTest.h

auto/Wrap/doxygen_core.i

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp