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/daemon/face/ethernet-channel.cpp b/daemon/face/ethernet-channel.cpp
index 21949b3..4b5a072 100644
--- a/daemon/face/ethernet-channel.cpp
+++ b/daemon/face/ethernet-channel.cpp
@@ -27,7 +27,7 @@
 #include "ethernet-protocol.hpp"
 #include "generic-link-service.hpp"
 #include "unicast-ethernet-transport.hpp"
-#include "core/global-io.hpp"
+#include "daemon/global.hpp"
 
 #include <boost/range/adaptor/map.hpp>
 #include <pcap/pcap.h>