1 files changed, 0 insertions, 56 deletions
diff --git a/lib/rake/invocation_chain.rb b/lib/rake/invocation_chain.rb
deleted file mode 100644
index 540628957c..0000000000
--- a/lib/rake/invocation_chain.rb
+++ /dev/null
@@ -1,56 +0,0 @@
-module Rake
-
-  # InvocationChain tracks the chain of task invocations to detect
-  # circular dependencies.
-  class InvocationChain < LinkedList
-
-    # Is the invocation already in the chain?
-    def member?(invocation)
-      head == invocation || tail.member?(invocation)
-    end
-
-    # Append an invocation to the chain of invocations. It is an error
-    # if the invocation already listed.
-    def append(invocation)
-      if member?(invocation)
-        fail RuntimeError, "Circular dependency detected: #{to_s} => #{invocation}"
-      end
-      conj(invocation)
-    end
-
-    # Convert to string, ie: TOP => invocation => invocation
-    def to_s
-      "#{prefix}#{head}"
-    end
-
-    # Class level append.
-    def self.append(invocation, chain)
-      chain.append(invocation)
-    end
-
-    private
-
-    def prefix
-      "#{tail} => "
-    end
-
-    # Null object for an empty chain.
-    class EmptyInvocationChain < LinkedList::EmptyLinkedList
-      @parent = InvocationChain
-
-      def member?(obj)
-        false
-      end
-
-      def append(invocation)
-        conj(invocation)
-      end
-
-      def to_s
-        "TOP"
-      end
-    end
-
-    EMPTY = EmptyInvocationChain.new
-  end
-end