unix: remove uv__pipe_accept()

It's basically a less advanced version of uv__server_io().  Drop the
former in favor of the latter.

src/unix/pipe.c

@@ -29,8 +29,6 @@
 #include <unistd.h>
 #include <stdlib.h>
 
-static void uv__pipe_accept(uv_loop_t* loop, uv__io_t* w, unsigned int events);
-
 
 int uv_pipe_init(uv_loop_t* loop, uv_pipe_t* handle, int ipc) {
   uv__stream_init(loop, (uv_stream_t*)handle, UV_NAMED_PIPE);
@@ -111,7 +109,7 @@ int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb) {
     return -errno;
 
   handle->connection_cb = cb;
-  handle->io_watcher.cb = uv__pipe_accept;
+  handle->io_watcher.cb = uv__server_io;
   uv__io_start(handle->loop, &handle->io_watcher, UV__POLLIN);
   return 0;
 }
@@ -212,29 +210,5 @@ void uv_pipe_connect(uv_connect_t* req,
 }
 
 
-/* TODO merge with uv__server_io()? */
-static void uv__pipe_accept(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
-  uv_pipe_t* pipe;
-  int sockfd;
-
-  pipe = container_of(w, uv_pipe_t, io_watcher);
-  assert(pipe->type == UV_NAMED_PIPE);
-
-  sockfd = uv__accept(uv__stream_fd(pipe));
-  if (sockfd == -1) {
-    if (errno != EAGAIN && errno != EWOULDBLOCK)
-      pipe->connection_cb((uv_stream_t*)pipe, -errno);
-    return;
-  }
-
-  pipe->accepted_fd = sockfd;
-  pipe->connection_cb((uv_stream_t*)pipe, 0);
-  if (pipe->accepted_fd == sockfd) {
-    /* The user hasn't called uv_accept() yet */
-    uv__io_stop(pipe->loop, &pipe->io_watcher, UV__POLLIN);
-  }
-}
-
-
 void uv_pipe_pending_instances(uv_pipe_t* handle, int count) {
 }