Removed duplicate test.

src/NzbDrone.Common.Test/Http/HttpClientFixture.cs

@@ -72,7 +72,6 @@ namespace NzbDrone.Common.Test.Http
         [TestCase(HttpStatusCode.InternalServerError)]
         [TestCase(HttpStatusCode.ServiceUnavailable)]
         [TestCase(HttpStatusCode.BadGateway)]
-        [TestCase(429)]
         public void should_throw_on_unsuccessful_status_codes(int statusCode)
         {
             var request = new HttpRequest("http://eu.httpbin.org/status/" + statusCode);