Sources close to New York Magazine have reported the weekly’s legit critic, John Simon, has parted ways with his longtime employer.It could not be determined if the split was amicable. Phone calls to Simon were not returned. A rep for New York would not comment on Simon’s current status at the magazine. In its bio of Simon, “The Oxford Companion to American Theater” reports, “He is often perceived as the most vitriolic of contemporary critics, but his writing is fluid and masterful.” In recent years, Simon’s barbs have carried less sting, especially with regard to musicals. The 79-year-old critic was born in Yugoslavia and studied at Harvard. Last month, Ada Calhoun resigned as New York’s second-string theater critic.