revert scatter2d examples to unparameterized detector c'tor

Examples/scatter2d/ApproximationDA.py

Examples/scatter2d/ApproximationLMA.py

Examples/scatter2d/ApproximationSSCA.py

Examples/scatter2d/BeamDivergence.py

Examples/scatter2d/BiMaterialCylinders.py

Examples/scatter2d/BoxesWithSpecularPeak.py

Examples/scatter2d/BuriedParticles.py

Examples/scatter2d/ConstantBackground.py

Examples/scatter2d/CoreShellNanoparticles.py

Examples/scatter2d/CorrelatedRoughness.py

Examples/scatter2d/CosineRipplesAtRectLattice.py

Examples/scatter2d/CylindersAndPrisms.py

Examples/scatter2d/CylindersInAverageLayer.py

Examples/scatter2d/CylindersInBA.py

Examples/scatter2d/CylindersInDWBA.py

Examples/scatter2d/CylindersWithSizeDistribution.py

Examples/scatter2d/DetectorResolutionFunction.py

Examples/scatter2d/HalfSpheresInAverageTopLayer.py

Examples/scatter2d/HexagonalLatticesWithBasis.py

Examples/scatter2d/Interference1DRadialParaCrystal.py