ATLANTA—Atlanta Hawks general manager Travis Schlenk moved quickly to lock down Nate McMillan as the full-time coach, reaching an agreement to remove the interim tag only two days after team’s season ended. The deal comes after McMillan, in his interim role, led the team to an improbable run to the Eastern Conference finals. Schlenk said Monday that “an agreement in place in principal” was reached earlier in the day with McMillan. “We’re just drawing up the contract,” Schlenk said. The team is expected to officially announce the deal on Tuesday. Details were not immediately available. McMillan, 56, was named interim coach after Lloyd Pierce was fired when the team had a 14–20 record. The Hawks enjoyed an immediate turnaround under McMillan. They played better late in games, protecting leads while posting a 27–11 mark that gave them the No. 5 seed in the Eastern Conference playoffs. It was Atlanta’s first …