Remove request delegation.

There's no reason we need this and having a smaller API to support is nice.

lib/vcr/structs.rb

@@ -136,9 +136,6 @@ def without_standard_port(uri)
   end
 
   class HTTPInteraction < Struct.new(:request, :response, :recorded_at)
-    extend ::Forwardable
-    def_delegators :request, :uri, :method
-
     def initialize(*args)
       @ignored = false
       super

spec/vcr/cassette_spec.rb

@@ -294,7 +294,7 @@ def stub_old_interactions(interactions)
 
           VCR.configuration.cassette_library_dir = "#{VCR::SPEC_ROOT}/fixtures/cassette_spec"
           cassette = VCR::Cassette.new('with_localhost_requests', :record => record_mode)
-          cassette.send(:previously_recorded_interactions).map { |i| URI.parse(i.uri).host }.should eq(%w[example.com])
+          cassette.send(:previously_recorded_interactions).map { |i| URI.parse(i.request.uri).host }.should eq(%w[example.com])
         end
 
         it "loads the recorded interactions from the library yml file" do

spec/vcr/structs_spec.rb

@@ -49,15 +49,6 @@
 
 module VCR
   describe HTTPInteraction do
-    %w( uri method ).each do |attr|
-      it "delegates :#{attr} to the request" do
-        sig = mock('request')
-        sig.should_receive(attr).and_return(:the_value)
-        instance = described_class.new(sig, nil)
-        instance.send(attr).should eq(:the_value)
-      end
-    end
-
     describe '#ignored?' do
       it 'returns false by default' do
         should_not be_ignored