COMP: Removed redundant itkSetClampMacro(NumberOfSamples)
COMP: Removed redundant itkSetClampMacro(NumberOfSamples)

Removed `itkSetClampMacro(NumberOfSamples)` from `ImageRandomSamplerBase`, as the macro call is already in its base class `ImageSamplerBase`.

Partially fixes issue #110 ("-Winconsistent-missing-override on MacOS")

SuperElastix/elastix,SuperElastix/elastix,SuperElastix/elastix,SuperElastix/elastix,SuperElastix/elastix