ENH: removing pragma warning without pushpop (Examples)

Examples/BasicFilters/BandMathFilterExample.cxx

Examples/BasicFilters/DEMToRainbowExample.cxx

Examples/BasicFilters/FrostImageFilter.cxx

Examples/BasicFilters/HillShadingExample.cxx

Examples/BasicFilters/IndexedToRGBExample.cxx

Examples/BasicFilters/LeeImageFilter.cxx

Examples/BasicFilters/MeanShiftVectorImageFilterExample.cxx

Examples/BasicFilters/PrintableImageFilterExample.cxx

Examples/BasicFilters/ScalingFilterExample.cxx

Examples/BasicFilters/otbBasicFiltersExamplesTests.cxx

Examples/ChangeDetection/ChangeDetectionFrameworkExample.cxx

Examples/ChangeDetection/DiffChDet.cxx

Examples/ChangeDetection/otbChangeDetectionExamplesTests.cxx

Examples/Classification/BayesianPluginClassifier.cxx

...fication/ExpectationMaximizationMixtureModelEstimator.cxx

Examples/Classification/KdTreeBasedKMeansClustering.cxx

Examples/Classification/ScalarImageKmeansClassifier.cxx

Examples/Classification/ScalarImageKmeansModelEstimator.cxx

Examples/Classification/ScalarImageMarkovRandomField1.cxx

Examples/Classification/otbClassificationExamplesTests.cxx