Dearon “Deezer D” Thompson, best known for his role as Nurse Malik McGrath on ER, has died. He was 55.The actor’s brother, Emmery Thompson, confirmed the tragic news in a post shared to Instagram on Friday. “My Big Brother! God is with you,” he wrote. “I will miss you. 🙏🏾 #deezerd.” Dearon was found unresponsive at his home in…