Remove the fd overload of AsyncSocket::newSocket

Summary: It's dead.

Reviewed By: yfeldblum

Differential Revision: D14192000

fbshipit-source-id: 3cecbc8e9f656080a023d676883de9943e7d0004

folly/io/async/AsyncSocket.h

@@ -310,9 +310,6 @@ class AsyncSocket : virtual public AsyncTransportWrapper {
   /**
    * Helper function to create a shared_ptr<AsyncSocket>.
    */
-  static std::shared_ptr<AsyncSocket> newSocket(EventBase* evb, int fd) {
-    return newSocket(evb, NetworkSocket::fromFd(fd));
-  }
   static std::shared_ptr<AsyncSocket> newSocket(
       EventBase* evb,
       NetworkSocket fd) {