Tests: Ruby input.rewind is no longer required.

For more information see:
rack/rack@42aff22

Author: andrey-zelenkov

test/ruby/input_rewind/config.ru

@@ -163,15 +163,6 @@ def test_ruby_application_input_each():
     assert client.post(body=body)['body'] == body, 'input each'
 
 
-@pytest.mark.skip('not yet')
-def test_ruby_application_input_rewind():
-    client.load('input_rewind')
-
-    body = '0123456789'
-
-    assert client.post(body=body)['body'] == body, 'input rewind'
-
-
 @pytest.mark.skip('not yet')
 def test_ruby_application_syntax_error(skip_alert):
     skip_alert(