1 files changed, 0 insertions, 89 deletions
diff --git a/lib/psych/tree_builder.rb b/lib/psych/tree_builder.rb
deleted file mode 100644
index 2b16290b8f..0000000000
--- a/lib/psych/tree_builder.rb
+++ /dev/null
@@ -1,89 +0,0 @@
-require 'psych/handler'
-
-module Psych
-  ###
-  # This class works in conjunction with Psych::Parser to build an in-memory
-  # parse tree that represents a YAML document.
-  #
-  # == Example
-  #
-  #   parser = Psych::Parser.new Psych::TreeBuilder.new
-  #   parser.parse('--- foo')
-  #   tree = parser.handler.root
-  #
-  # See Psych::Handler for documentation on the event methods used in this
-  # class.
-  class TreeBuilder < Psych::Handler
-    # Create a new TreeBuilder instance
-    def initialize
-      @stack = []
-      @last  = nil
-    end
-
-    # Returns the root node for the built tree
-    def root
-      @stack.first
-    end
-
-    %w{
-      Sequence
-      Mapping
-    }.each do |node|
-      class_eval %{
-        def start_#{node.downcase}(anchor, tag, implicit, style)
-          n = Nodes::#{node}.new(anchor, tag, implicit, style)
-          @last.children << n
-          push n
-        end
-
-        def end_#{node.downcase}
-          pop
-        end
-      }
-    end
-
-    ###
-    # Handles start_document events with +version+, +tag_directives+,
-    # and +implicit+ styling.
-    #
-    # See Psych::Handler#start_document
-    def start_document version, tag_directives, implicit
-      n = Nodes::Document.new(version, tag_directives, implicit)
-      @last.children << n
-      push n
-    end
-
-    ###
-    # Handles end_document events with +version+, +tag_directives+,
-    # and +implicit+ styling.
-    #
-    # See Psych::Handler#start_document
-    def end_document implicit_end
-      @last.implicit_end = implicit_end
-      pop
-    end
-
-    def start_stream encoding
-      push Nodes::Stream.new(encoding)
-    end
-
-    def scalar value, anchor, tag, plain, quoted, style
-      @last.children << Nodes::Scalar.new(value,anchor,tag,plain,quoted,style)
-    end
-
-    def alias anchor
-      @last.children << Nodes::Alias.new(anchor)
-    end
-
-    private
-    def push value
-      @stack.push value
-      @last = value
-    end
-
-    def pop
-      @stack.pop
-      @last = @stack.last
-    end
-  end
-end