By Michael Tedder The world’s greatest living athlete has announced her retirement. Tennis legend Serena Williams has announced her retirement. In an essay for Vogue, she says that she is planning to step away from the sport after participating in the U.S. Open in New York this summer. She plans to focus on her family and other business ventures, though she would prefer you not use the “r” word. It’s more of an evolution, she says. “I have never liked the word retirement,” she writes. “It doesn’t feel like a modern word to me. I’ve been thinking of this as a transition, but I want to be sensit…