Revert "add ```template <typename T>" - oops we don't need this in master!

This reverts commit b3c4aff2c7.

include/mapnik/transform_expression.hpp

@@ -38,8 +38,6 @@
 #include <boost/fusion/include/vector.hpp>
 #pragma GCC diagnostic pop
 
-//
-#include <boost/utility/value_init.hpp>
 // stl
 #include <vector>
 #include <memory>
@@ -172,10 +170,6 @@ struct transform_node
     transform_node()
         : base_() {}
 
-    template <typename T>
-    transform_node(boost::value_initialized<T> const&)
-        : base_() {}
-
     template <typename T>
     transform_node(T const& val)
         : base_(val) {}