Remove unneeded headers from save_map.{cpp,hpp}

include/mapnik/save_map.hpp

@@ -24,12 +24,13 @@
 #ifndef SAVE_MAP_HPP
 #define SAVE_MAP_HPP
 // mapnik
-#include <mapnik/map.hpp>
+#include <mapnik/config.hpp>
 // stl
 #include <string>
 
 namespace mapnik
 {
+class Map;
 MAPNIK_DECL void save_map(Map const& map, std::string const& filename, bool explicit_defaults = false);
 
 MAPNIK_DECL std::string save_map_to_string(Map const& map, bool explicit_defaults = false);

src/save_map.cpp

@@ -23,16 +23,13 @@
 
 // mapnik
 #include <mapnik/save_map.hpp>
-#include <mapnik/image_util.hpp>
+#include <mapnik/map.hpp>
 #include <mapnik/ptree_helpers.hpp>
 #include <mapnik/expression_string.hpp>
-#include <mapnik/path_expression_grammar.hpp>
 #include <mapnik/raster_colorizer.hpp>
 
 // boost
 #include <boost/algorithm/string.hpp>
-#include <boost/lexical_cast.hpp>
-#include <boost/tokenizer.hpp>
 #include <boost/optional.hpp>
 #include <boost/property_tree/ptree.hpp>
 #include <boost/property_tree/xml_parser.hpp>