core/memory: Remove unnecessary includes

In 5840ce2950, the page table construct
was moved to the common library (which utilized these inclusions). Since
the move, nothing requires these headers to be included within the
memory header.

src/core/memory.h

@@ -6,9 +6,6 @@
 
 #include <cstddef>
 #include <string>
-#include <tuple>
-#include <vector>
-#include <boost/icl/interval_map.hpp>
 #include "common/common_types.h"
 
 namespace Common {