Remove the fd overload of AsyncSocket::OptionKey::apply

Summary: Everything has been migrated over to the NetworkSocket overload.

Reviewed By: yfeldblum

Differential Revision: D13566609

fbshipit-source-id: 920505a9e91f1acc5810949049880ed07294621b

folly/io/async/AsyncSocket.h

@@ -375,9 +375,6 @@ class AsyncSocket : virtual public AsyncTransportWrapper {
     int apply(NetworkSocket fd, int val) const {
       return netops::setsockopt(fd, level, optname, &val, sizeof(val));
     }
-    int apply(int fd, int val) const {
-      return apply(NetworkSocket::fromFd(fd), val);
-    }
     int level;
     int optname;
   };