remove check

Fixes a -Wincompatible-pointer-types error on Windows, since uv_os_fd_t
is not int but HANDLE.

test/test-poll-oob.c

@@ -68,7 +68,7 @@ static void idle_cb(uv_idle_t* idle) {
 static void poll_cb(uv_poll_t* handle, int status, int events) {
   char buffer[5];
   int n;
-  int fd;
+  uv_os_fd_t fd;
 
   ASSERT_OK(uv_fileno((uv_handle_t*)handle, &fd));
   memset(buffer, 0, 5);

test/test-tcp-rst.c

@@ -47,11 +47,6 @@ static void read_cb(uv_stream_t* t, ssize_t nread, const uv_buf_t* buf) {
   ASSERT_PTR_EQ((uv_tcp_t*) t, &tcp);
   ASSERT_EQ(nread, UV_ECONNRESET);
 
-  int fd;
-  ASSERT_OK(uv_fileno((uv_handle_t*) t, &fd));
-  uv_handle_type type = uv_guess_handle(fd);
-  ASSERT_EQ(type, UV_TCP);
-
   uv_close((uv_handle_t *) t, close_cb);
   free(buf->base);
 }