Colorado Democrats stripped a massive oil and gas permitting bill of its most stringent measures late Thursday night in an effort to garner support from Gov. Jared Polis and to improve its chances of making it through a legislative session that is swiftly nearing its end. Almost all of the air-quality provisions of HB23-1294 that would have made it more difficult for oil and gas companies to receive new drilling permits were removed by the bill’s sponsors during a House committee meeting that ended after 10:30 p.m.