Remove unneeded and nonstandard includes.
#include <memory>
#include <vespa/vespalib/util/alloc.h>
#include <vespa/vespalib/util/generationholder.h>
-#include <bits/stl_algo.h>
-#include <bits/stl_function.h>
#include <vespa/fastos/dynamiclibrary.h>
namespace vespalib {
