Irene Dunne and Cary Grant in “The Awful Truth” (1937). Do movies have a sell-by date? I’ve never thought so. But the other day, a popular website posted their choices for “the 50 best romantic comedies in movie history.” Forty-nine of them had been released since 1980. The one outlier, “Harold and Maude,” dated way back to 1971. Apparently, their idea of “movie history” doesn’t stretch back quite as far as mine. The list was quickly greeted with howls of outrage on Twitter (as most things are). Where was “The Apartment”? “It Happened One Night”? “His Girl Friday”? “Annie Hall”? One of the lis…