CDRIVER-756: Don't overwrite the errno into something we won't be checking for anyway

Author: bjori

src/mongoc/mongoc-socket.c

@@ -1117,25 +1117,13 @@ mongoc_socket_sendv (mongoc_socket_t  *sock,      /* IN */
          BSON_ASSERT (iovcnt - cur);
          BSON_ASSERT (iov [cur].iov_len);
       } else if (OPERATION_EXPIRED (expire_at)) {
-#ifdef _WIN32
-         errno = WSAETIMEDOUT;
-#else
-         errno = ETIMEDOUT;
-#endif
          GOTO(CLEANUP);
       }
 
       /*
        * Block on poll() until our desired condition is met.
        */
       if (!_mongoc_socket_wait (sock->sd, POLLOUT, expire_at)) {
-         if (ret == 0){
-#ifdef _WIN32
-            errno = WSAETIMEDOUT;
-#else
-            errno = ETIMEDOUT;
-#endif
-         }
          GOTO(CLEANUP);
       }
    }