ENH: remove GPU Cuda code for now

Code/BasicFilters/GPUCuda/CMakeLists.txt

Code/BasicFilters/GPUCuda/foo.cxx

...s/GPUCuda/otbCublasStreamingStatisticsVectorImageFilter.h

...GPUCuda/otbCublasStreamingStatisticsVectorImageFilter.txx

Code/Hyperspectral/GPUCuda/CMakeLists.txt

Code/Hyperspectral/GPUCuda/foo.cxx

Code/Hyperspectral/GPUCuda/otbCudaFCLSFilter.cu

Code/Hyperspectral/GPUCuda/otbCudaFCLSFilter.h

Code/Hyperspectral/GPUCuda/otbCudaFCLSFilter.txx

Testing/otbCublasStreamingStatisticsVectorImageFilter.cxx

Testing/otbCudaFCLSImageFilter.cxx