Remove registration.hpp and api.h

They are deprecated.

Change-Id: Ia796a82814efb7bc4d796623c716833e000118bf
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/include/commandutils.hpp b/include/commandutils.hpp
index 30ed68a..3d42aeb 100644
--- a/include/commandutils.hpp
+++ b/include/commandutils.hpp
@@ -16,6 +16,7 @@
 
 #pragma once
 #include <iostream>
+#include <ipmid/api.hpp>
 #include <sdbusplus/bus.hpp>
 
 static constexpr bool debug = false;