WASHINGTON — A unanimous U.S. Supreme Court ruled Tuesday that federal courts can hear a dispute over Colorado’s Internet tax law. One justice suggested it was time to reconsider the ban on state collection of sales taxes from companies outside their borders. The ruling is a win for business groups that want to challenge the state’s so-called Amazon tax, which requires extensive reporting by out-of-state retailers that don’t collect the state’s 2.9 percent sales tax from Colorado …