[axes7] simplify CoordSystem2D: rm AxisData ()

Base/Axis/ConstKBinAxis.cpp

Base/Axis/FixedBinAxis.cpp

Base/Axis/FixedBinAxis.h

Base/Axis/IAxis.cpp

Base/Axis/IAxis.h

Base/Axis/PointwiseAxis.cpp

Base/Axis/PointwiseAxis.h

Base/Axis/VariableBinAxis.cpp

Base/Axis/VariableBinAxis.h

Device/Coord/CoordSystem1D.cpp

Device/Coord/CoordSystem2D.cpp

Device/Coord/CoordSystem2D.h

Device/Histo/IHistogram.cpp

GUI/Model/Data/Data1DViewItem.cpp

GUI/Model/Data/IntensityDataItem.cpp

GUI/Model/Data/SpecularDataItem.cpp

GUI/Model/Device/AxesItems.cpp

GUI/Model/Device/AxesItems.h

GUI/Model/Device/BeamItems.cpp

GUI/Model/Device/InstrumentItems.cpp