remove return from colorinterp setter
remove return from colorinterp setter

njwilson23/rasterio,njwilson23/rasterio,perrygeo/rasterio,njwilson23/rasterio,youngpm/rasterio,youngpm/rasterio,kapadia/rasterio,johanvdw/rasterio,clembou/rasterio,johanvdw/rasterio,perrygeo/rasterio,clembou/rasterio,johanvdw/rasterio,perrygeo/rasterio,brendan-ward/rasterio,brendan-ward/rasterio,sgillies/rasterio,youngpm/rasterio,clembou/rasterio,brendan-ward/rasterio,kapadia/rasterio,snorfalorpagus/rasterio,kapadia/rasterio