1 files changed, 0 insertions, 51 deletions
diff --git a/ruby_1_9_3/lib/rake/invocation_chain.rb b/ruby_1_9_3/lib/rake/invocation_chain.rb
deleted file mode 100644
index 8a01ab4c29..0000000000
--- a/ruby_1_9_3/lib/rake/invocation_chain.rb
+++ /dev/null
@@ -1,51 +0,0 @@
-module Rake
-
-  ####################################################################
-  # InvocationChain tracks the chain of task invocations to detect
-  # circular dependencies.
-  class InvocationChain
-    def initialize(value, tail)
-      @value = value
-      @tail = tail
-    end
-
-    def member?(obj)
-      @value == obj || @tail.member?(obj)
-    end
-
-    def append(value)
-      if member?(value)
-        fail RuntimeError, "Circular dependency detected: #{to_s} => #{value}"
-      end
-      self.class.new(value, self)
-    end
-
-    def to_s
-      "#{prefix}#{@value}"
-    end
-
-    def self.append(value, chain)
-      chain.append(value)
-    end
-
-    private
-
-    def prefix
-      "#{@tail.to_s} => "
-    end
-
-    class EmptyInvocationChain
-      def member?(obj)
-        false
-      end
-      def append(value)
-        InvocationChain.new(value, self)
-      end
-      def to_s
-        "TOP"
-      end
-    end
-
-    EMPTY = EmptyInvocationChain.new
-  end
-end