Remove test for XML YAML parsing

The support for YAML parsing in XML has been removed from Active Support
since it introduced an security risk. See 43109ec for more detail.

activeresource/test/abstract_unit.rb

@@ -77,19 +77,6 @@ def setup_response
       }]
     }
   }.to_json
-  # - resource with yaml array of strings; for ARs using serialize :bar, Array
-  @marty = <<-eof.strip
-    <?xml version=\"1.0\" encoding=\"UTF-8\"?>
-    <person>
-      <id type=\"integer\">5</id>
-      <name>Marty</name>
-      <colors type=\"yaml\">---
-    - \"red\"
-    - \"green\"
-    - \"blue\"
-    </colors>
-    </person>
-  eof
 
   @startup_sound = {
     :sound => {
@@ -101,7 +88,6 @@ def setup_response
     mock.get    "/people/1.json",               {}, @matz
     mock.get    "/people/1.xml",                {}, @matz_xml
     mock.get    "/people/2.xml",                {}, @david
-    mock.get    "/people/5.xml",                {}, @marty
     mock.get    "/people/Greg.json",            {}, @greg
     mock.get    "/people/6.json",               {}, @joe
     mock.get    "/people/4.json",               { 'key' => 'value' }, nil, 404

activeresource/test/cases/base_test.rb

@@ -1077,19 +1077,6 @@ class BaseTest < Test::Unit::TestCase
     end
   end
 
-  def test_load_yaml_array
-    assert_nothing_raised do
-      Person.format = :xml
-      marty = Person.find(5)
-      assert_equal 3, marty.colors.size
-      marty.colors.each do |color|
-        assert_kind_of String, color
-      end
-    end
-  ensure
-    Person.format = :json
-  end
-
   def test_with_custom_formatter
     addresses = [{ :id => "1", :street => "1 Infinite Loop", :city => "Cupertino", :state => "CA" }].to_xml(:root => :addresses)