Minor, remove unnecessary braces for one-liner conditional

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

io.c

@@ -61,9 +61,8 @@ int uev_io_init(uev_ctx_t *ctx, uev_t *w, uev_cb_t *cb, void *arg, int fd, int e
 int uev_io_set(uev_t *w, int fd, int events)
 {
 
-	if ((events & UEV_ONESHOT) && w->active) {
+	if ((events & UEV_ONESHOT) && w->active)
 		return uev_watcher_rearm(w);
-	}
 
 	/* Ignore any errors, only to clean up anything lingering ... */
 	uev_io_stop(w);