removed unnecessary code in Ruleset#toCSS
removed unnecessary code in Ruleset#toCSS

whitelynx/carto,stefanklug/carto,mapbox/carto,gravitystorm/carto,midnightcomm/carto,clhenrick/carto,pnorman/carto,1ec5/carto,madeinqc/carto,CartoDB/carto,tomhughes/carto,CartoDB/carto