[buffer] remove more unused functionality

include/boost/geometry/extensions/algorithms/buffer/buffer_policies.hpp

@@ -111,11 +111,9 @@ struct buffer_turn_operation
     : public detail::overlay::traversal_turn_operation<Point, SegmentRatio>
 {
     int piece_index;
-    bool include_in_occupation_map;
 
     inline buffer_turn_operation()
         : piece_index(-1)
-        , include_in_occupation_map(false)
     {}
 };
 

include/boost/geometry/extensions/algorithms/buffer/buffered_ring.hpp

@@ -70,7 +70,7 @@ struct buffered_ring_collection : public std::vector<Ring>
 }} // namespace detail::buffer
 
 
-// Turn of concept checking (for now)
+// Turn off concept checking (for now)
 namespace dispatch
 {
 template <typename Geometry, bool IsConst>
@@ -129,7 +129,6 @@ struct tag<detail::buffer::buffered_ring_collection<Ring> >
 
 
 
-
 namespace core_dispatch
 {
 
@@ -191,52 +190,6 @@ struct copy_segments
         >
 {};
 
-// adapted from now refactored point_in_ring
-struct point_in_buffered_ring
-{
-    template
-    <
-        typename Point,
-        typename Ring,
-        typename Strategy
-    >
-    static inline int apply(Point const& point, Ring const& ring,
-            Strategy const& strategy)
-    {
-        boost::ignore_unused_variable_warning(strategy);
-
-        if (boost::size(ring) < 4u)
-        {
-            return -1;
-        }
-
-// TODO: if this code is, in the end, still used, adapt for open/ccw rings
-//       Currently it is apparently not used
-//        order_as_direction
-//            <
-//                geometry::point_order<MultiGeometry>::value
-//            >::value,
-//        geometry::closure<MultiGeometry>::value,
-
-        typedef typename boost::range_iterator<Ring const>::type iterator_type;
-        typename Strategy::state_type state;
-        iterator_type it = boost::begin(ring);
-
-        for (iterator_type previous = it++;
-            it != boost::end(ring);
-            ++previous, ++it)
-        {
-            if (! strategy.apply(point, *previous, *it, state))
-            {
-                break;
-            }
-        }
-
-        return strategy.result(state);
-    }
-};
-
-
 template <typename Point, typename MultiGeometry>
 struct within
 <