core/memory: Remove unnecessary includes

In 93da8e0abfcdcc6e3cb5488a0db12373429f1377, 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 {