By Tzvi Machlin The Dallas Cowboys are running out of time to reach terms on a new deal with one of their star players from last season. But it appears they’re going to let that clock run out. According to ESPN NFL insider Adam Schefter, the Cowboys are not expected to reach an agreement on a contract extension with tight end Dalton Schultz. Dallas franchise tagged Schultz during the offseason but only have until Friday at 4 p.m. ET to extend him ahead of this season. Schultz is coming off a career year with the Cowboys. He had 78 receptions for 808 yards and eight touchdowns for the No. 1 off…