[buffer] remove now unused functionality

include/boost/geometry/algorithms/detail/occupation_info.hpp

@@ -90,15 +90,10 @@ public :
     std::vector<detail::left_turns::turn_angle_info<typename AngleInfo::point_type> > turns;
     int m_count;
 
-private :
-    bool m_occupied;
-    bool m_calculated;
 
 public :
     inline occupation_info()
         : m_count(0)
-        , m_occupied(false)
-        , m_calculated(false)
     {}
 
     template <typename RobustPoint>
@@ -136,8 +131,6 @@ public :
         }
         detail::left_turns::turn_angle_info<typename AngleInfo::point_type> turn(seg_id, incoming_point, outgoing_point);
         turns.push_back(turn);
-
-        m_calculated = false;
     }
 
     template <typename RobustPoint>

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

@@ -142,8 +142,6 @@ struct buffer_turn_info
     int count_on_uu;
 #endif
 
-    std::set<int> piece_indices_to_skip;
-
 #ifdef BOOST_GEOMETRY_DEBUG_WITH_MAPPER
     std::string debug_string;
 #endif

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

@@ -318,15 +318,6 @@ struct buffered_piece_collection
             return;
         }
 
-        // Don't check against a piece of which is was preferred in the "situations" for multi - map
-        if (turn.piece_indices_to_skip.count(pc.index) > 0)
-        {
-            return;
-        }
-
-        segment_identifier seg_id = pc.first_seg_id;
-        BOOST_ASSERT(seg_id.segment_index >= 0);
-
         int const geometry_code = detail::within::point_in_geometry(turn.robust_point, pc.robust_ring);
 
         if (geometry_code == 1)
@@ -387,32 +378,6 @@ struct buffered_piece_collection
         }
     }
 
-
-    struct cluster_info
-    {
-        inline cluster_info(int i, point_type p, buffer_turn_operation_type op)
-            : turn_index(i)
-            , point(p)
-            , operation(op)
-        {}
-
-        inline cluster_info()
-            : turn_index(-1)
-        {}
-
-        int turn_index;
-        point_type point;
-        buffer_turn_operation_type operation;
-    };
-
-    struct clustered_info
-    {
-        int piece_index;
-        std::set<segment_identifier> intersecting_ids;
-        std::vector<cluster_info> intersecting_segments;
-    };
-
-
     inline void get_occupation()
     {
         // 1: Add all intersection points to occupation map