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/fw/ncc-strategy.t.cpp b/tests/daemon/fw/ncc-strategy.t.cpp
index 1b71aa2..4044251 100644
--- a/tests/daemon/fw/ncc-strategy.t.cpp
+++ b/tests/daemon/fw/ncc-strategy.t.cpp
@@ -24,12 +24,10 @@
  */
 
 #include "fw/ncc-strategy.hpp"
+
+#include "tests/daemon/face/dummy-face.hpp"
 #include "strategy-tester.hpp"
 #include "topology-tester.hpp"
-#include "tests/daemon/face/dummy-face.hpp"
-#include "tests/limited-io.hpp"
-
-#include "tests/test-common.hpp"
 
 namespace nfd {
 namespace fw {