Martin Short is shooting down rumors that he’s dating Meryl Streep. The two-time Emmy Award-winning funnyman addressed the speculation that he and his recent “Only Murders in the Building” co-star are a couple. During an appearance on the latest episode of Bill Maher’s “Club Random” podcast, the host referred to actors as a “power couple.” “We’re not a couple,” Short, 73, clarified. “We are just very close friends.” Maher joked that a romance between the two wouldn’t be a bad idea, “because there’s nothing more powerful in Hollywood than a power couple.” “It worked for Tom Cruise and Nicole Ki…