Use BOOST_INTRUSIVE_STATIC_ASSERT instead of BOOST_STATIC_ASSERT to reduce library level and weight.

example/doc_map.cpp

@@ -10,8 +10,6 @@
 //
 /////////////////////////////////////////////////////////////////////////////
 //[doc_map_code
-#include <boost/static_assert.hpp>
-#include <boost/type_traits/is_same.hpp>
 #include <boost/intrusive/set.hpp>
 #include <boost/intrusive/unordered_set.hpp>
 #include <vector>
@@ -50,9 +48,6 @@ typedef unordered_set< MyClass, key_of_value<first_int_is_key> > UnorderedMap;
 
 int main()
 {
-   BOOST_STATIC_ASSERT((boost::is_same<  OrderedMap::key_type, int>::value));
-   BOOST_STATIC_ASSERT((boost::is_same<UnorderedMap::key_type, int>::value));
-
    //Create several MyClass objects, each one with a different value
    //and insert them into the omap
    std::vector<MyClass> values;