remove uneeded access to format tree

include/mapnik/text/text_properties.hpp

@@ -183,8 +183,6 @@ struct MAPNIK_DECL text_symbolizer_properties
     void evaluate_text_properties(feature_impl const& feature, attributes const& attrs);
     // Sets new format tree.
     void set_format_tree(formatting::node_ptr tree);
-    // Get format tree.
-    formatting::node_ptr format_tree() const;
     // Get a list of all expressions used in any placement.
     // This function is used to collect attributes.
     void add_expressions(expression_set & output) const;

src/text/text_properties.cpp

@@ -115,11 +115,6 @@ void text_symbolizer_properties::set_format_tree(formatting::node_ptr tree)
     tree_ = tree;
 }
 
-formatting::node_ptr text_symbolizer_properties::format_tree() const
-{
-    return tree_;
-}
-
 void text_symbolizer_properties::text_properties_from_xml(xml_node const& node)
 {
     // The options 'margin' and 'repeat-distance' replace 'minimum-distance'.