The people who make “Saturday Night Live” always get ticked off when some TV writer declares the show to be no longer relevant (let alone funny). What’s that old headline joke? Oh, yeah — “Saturday Night Dead.” This TV writer will not get caught in that trap because I’ve watched “SNL” long enough to know better. When times are bad and riotous sketches hard to come by, the show always finds a way to rise again, like some great comedy phoenix. “SNL” is cyclical in that way. So even though it has veered far off course the last few seasons, I won’t dare read any last rites.