minor gruntfile cleanup
minor gruntfile cleanup

camikazegreen/photoshop-scrambler,camikazegreen/photoshop-scrambler,codeorelse/generator-core,kristjanmik/generator-assets,camikazegreen/photoshop-scrambler,alesitalugo/generator-core,MikkoH/generator-core,adobe-photoshop/generator-core,jaredadobe/generator