BUG: removing useless #include in SIFT/SURF

Examples/FeatureExtraction/SIFTFastExample.cxx

Examples/FeatureExtraction/SURFExample.cxx

...ImageToFastSIFTKeyPointSetFilterOutputDescriptorAscii.cxx

...geToFastSIFTKeyPointSetFilterOutputInterestPointAscii.cxx

...Extraction/otbImageToSIFTKeyPointSetFilterOutputAscii.cxx

.../otbImageToSIFTKeyPointSetFilterOutputDescriptorAscii.cxx

...Extraction/otbImageToSIFTKeyPointSetFilterOutputImage.cxx

...bImageToSIFTKeyPointSetFilterOutputInterestPointAscii.cxx

...eatureExtraction/otbImageToSIFTKeyPointSetFilterValid.cxx

.../otbImageToSURFKeyPointSetFilterOutputDescriptorAscii.cxx

...bImageToSURFKeyPointSetFilterOutputInterestPointAscii.cxx