STY: Remove unused includes of iostream and fstream

Modules/Adapters/OSSIMAdapters/include/otbDEMHandler.h

.../Adapters/OSSIMAdapters/include/otbFilterFunctionValues.h

Modules/Adapters/OSSIMAdapters/include/otbImageKeywordlist.h

...ns/AppClassification/include/otbLearningApplicationBase.h

.../include/otbTrainDimensionalityReductionApplicationBase.h

.../CommandLineParser/include/otbCommandLineArgumentParser.h

Modules/Core/Common/include/otbCommandProgressUpdate.h

Modules/Core/Common/include/otbStringToHTML.h

Modules/Core/Common/src/otbStringToHTML.cxx

Modules/Core/Transform/include/otbCompositeTransform.h

Modules/Core/Transform/include/otbGenericMapProjection.h

Modules/Core/Transform/include/otbSensorModelBase.h

Modules/Core/VectorDataBase/include/otbDataNode.h

...ure/Descriptors/include/otbImageToSURFKeyPointSetFilter.h

Modules/Feature/Textures/include/otbSFSTexturesFunctor.h

Modules/Filtering/DEM/include/otbDEMToImageGenerator.h

Modules/Filtering/MathParser/include/otbMaskMuParserFilter.h

...iltering/Projection/include/otbOrthoRectificationFilter.h

Modules/IO/Carto/include/otbMapFileProductWriter.h

Modules/IO/Carto/include/otbOSMDataToVectorDataGenerator.h