Removed unused test file

This test file is not be running from a long time
This test is already covered in controller/caching_test.rb

actionpack/test/metal/caching_test.rb

@@ -1,32 +0,0 @@
-require 'abstract_unit'
-
-CACHE_DIR = 'test_cache'
-# Don't change '/../temp/' cavalierly or you might hose something you don't want hosed
-FILE_STORE_PATH = File.join(File.dirname(__FILE__), '/../temp/', CACHE_DIR)
-
-class CachingController < ActionController::Metal
-  abstract!
-
-  include ActionController::Caching
-
-  self.page_cache_directory = FILE_STORE_PATH
-  self.cache_store = :file_store, FILE_STORE_PATH
-end
-
-class PageCachingTestController < CachingController
-  caches_page :ok
-
-  def ok
-    self.response_body = "ok"
-  end
-end
-
-class PageCachingTest < ActionController::TestCase
-  tests PageCachingTestController
-
-  def test_should_cache_get_with_ok_status
-    get :ok
-    assert_response :ok
-    assert File.exist?("#{FILE_STORE_PATH}/page_caching_test/ok.html"), "get with ok status should have been cached"
-  end
-end