core+daemon: eliminate scheduler::{schedule,cancel} wrappers

Also move core/global-io.hpp to daemon/global.hpp

Refs: #4528, #4883
Change-Id: I0b99029f1a19d7451aab57099cd3303b7eb42ff3
diff --git a/tests/daemon/face/test-netif.cpp b/tests/daemon/face/test-netif.cpp
index c1a734d..a19623f 100644
--- a/tests/daemon/face/test-netif.cpp
+++ b/tests/daemon/face/test-netif.cpp
@@ -24,7 +24,7 @@
  */
 
 #include "test-netif.hpp"
-#include "core/global-io.hpp"
+#include "daemon/global.hpp"
 
 namespace nfd {
 namespace face {