delete unused code

Now that we merge trees from the top down, we don't need to search
through the whole tree for particular nodes, just walk it and merge.

2 files changed, 0 insertions, 50 deletions

diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb
index a25a061fc0..31867b6c88 100644
--- a/activerecord/lib/active_record/associations/join_dependency.rb
+++ b/activerecord/lib/active_record/associations/join_dependency.rb
@@ -61,30 +61,10 @@ module ActiveRecord
         build tree, @join_root, Arel::InnerJoin
       end
 
-      def graft(associations)
-        associations.reject { |join_node|
-          find_node join_node
-        }.each { |join_node|
-          parent     = find_node(join_node.parent) || join_root
-          reflection = join_node.reflection
-          type       = join_node.join_type
-
-          next if parent.children.find { |j| j.reflection == reflection }
-          build_scalar reflection, parent, type
-        }
-        self
-      end
-
       def reflections
         join_root.drop(1).map!(&:reflection)
       end
 
-      def outer_joins
-        nodes = join_root.drop 1
-        nodes.each { |n| n.join_type = Arel::OuterJoin }
-        nodes
-      end
-
       def merge_outer_joins!(other)
         left  = join_root
         right = other.join_root
@@ -148,26 +128,6 @@ module ActiveRecord
         dup
       end
 
-      def find_node(target_node)
-        stack = target_node.parents << target_node
-
-        left  = [join_root]
-        right = stack.shift
-
-        loop {
-          match = left.find { |l| l.match? right }
-
-          if match
-            return match if stack.empty?
-
-            left  = match.children
-            right = stack.shift
-          else
-            return nil
-          end
-        }
-      end
-
       def remove_duplicate_results!(base, records, associations)
         associations.each do |node|
           reflection = base.reflect_on_association(node.name)
diff --git a/activerecord/lib/active_record/associations/join_dependency/join_part.rb b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
index 7175dff5ac..0bd47a3646 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_part.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
@@ -40,16 +40,6 @@ module ActiveRecord
           self.class == other.class
         end
 
-        def parents
-          parents = []
-          node = parent
-          while node
-            parents.unshift node
-            node = node.parent
-          end
-          parents
-        end
-
         def each(&block)
           yield self
           children.each { |child| child.each(&block) }