minor: Take out unnecessary clumsy sleep at the end of regression Test404Response().

This wasn't actually necessary in the end but was accidentally left in.

OpenSim/Region/CoreModules/Scripting/HttpRequest/Tests/ScriptsHttpRequestsTests.cs

@@ -191,9 +191,6 @@ namespace OpenSim.Region.CoreModules.Scripting.HttpRequest.Tests
             hr.Url = "test://something";
             hr.SendRequest();
 
-            while (!hr.Finished)
-                Thread.Sleep(100);
-
             Assert.That(hr.Status, Is.EqualTo((int)HttpStatusCode.NotFound));
             Assert.That(hr.ResponseBody, Is.EqualTo(rawResponse));
         }