In middle-ram iterate_ways/relations can now be empty

We don't need to track any objects in create mode and middle-ram does
not support append mode.

Author: joto

src/middle-pgsql.cpp

@@ -439,7 +439,7 @@ void middle_pgsql_t::way_delete(osmid_t osm_id)
     m_db_copy.delete_object(osm_id);
 }
 
-void middle_pgsql_t::iterate_ways(middle_t::pending_processor &pf)
+void middle_pgsql_t::iterate_ways(pending_processor &pf)
 {
     // enqueue the jobs
     osmid_t id;

src/middle-pgsql.hpp

@@ -80,7 +80,7 @@ struct middle_pgsql_t : public slim_middle_t
 
     void flush() override;
 
-    void iterate_ways(middle_t::pending_processor &pf) override;
+    void iterate_ways(pending_processor &pf) override;
     void iterate_relations(pending_processor &pf) override;
 
     bool has_pending() const override;

src/middle-ram.cpp

@@ -64,28 +64,6 @@ size_t middle_ram_t::nodes_get_list(osmium::WayNodeList *nodes) const
     return count;
 }
 
-void middle_ram_t::iterate_relations(pending_processor &pf)
-{
-    //TODO: just dont do anything
-
-    //let the outputs enqueue everything they have the non slim middle
-    //has nothing of its own to enqueue as it doesnt have pending anything
-    pf.enqueue_relations(id_tracker::max());
-
-    //let the threads process the relations
-    pf.process_relations();
-}
-
-void middle_ram_t::iterate_ways(middle_t::pending_processor &pf)
-{
-    //let the outputs enqueue everything they have the non slim middle
-    //has nothing of its own to enqueue as it doesnt have pending anything
-    pf.enqueue_ways(id_tracker::max());
-
-    //let the threads process the ways
-    pf.process_ways();
-}
-
 void middle_ram_t::release_relations() { m_rels.clear(); }
 
 void middle_ram_t::release_ways() { m_ways.clear(); }

src/middle-ram.hpp

@@ -115,8 +115,8 @@ struct middle_ram_t : public middle_t, public middle_query_t
 
     idlist_t relations_using_way(osmid_t way_id) const override;
 
-    void iterate_ways(middle_t::pending_processor &pf) override;
-    void iterate_relations(pending_processor &pf) override;
+    void iterate_ways(pending_processor &) override {}
+    void iterate_relations(pending_processor &) override {}
 
     bool has_pending() const override { return false; }