ARLINGTON, Texas — The Dallas Cowboys’ march to a third-consecutive 10-win season has been the equivalent of driving across Interstate 30 at rush hour in quarantine-level traffic. For a third consecutive season the Cowboys have reached double digit wins, only this season most of their obstacles have been as tall as the yellow line on a highway. On Sunday night, the Cowboys toyed around with what was their biggest obstacle to date: the Philadelphia Eagles, whom the Cowboys treated like roadkill. The Cowboys easily handled the Eagles in a 33-13 win. This was the most impressive win of the season…