Leonard Pitts: Aunt Jemima is off the pancake box

“I wish knew how it would feel to be free” — Nina Simone, 1967
Here’s a knock-knock joke:"Knock knock.""Who's there?""Aunt Jemima.""Aunt Jemima who?""Ain't yo' mama on the pancake box?"Okay, so you're not laughing. But that joke killed in 1969 on the playground at Adams Junior High. What self-respecting black kid wanted his mama likened to the handkerchief-head mammy who beamed from the box of pancake mix?Now comes word Aunt Jemima will no longer be “on the pancake