And the drama unfolds. TMZ just broke the news that the doctor who performed the endoscopy on late legendary comedian Joan Rivers at Yorkville Endoscopy, NY, has been fired by the clinic’s board.Dr. Lawrence Cohen stepped down after the board asked him to do so – however, the board isn’t directly blaming him for Joan’s death.A rep for the clinic confirmed he was ousted from his position as medical director. According to our sources … the board’s...