Revert "After aborting a thread, wait for it to actually finish. EXPERIMENTAL for OSG"

This reverts commit 241ed5734e.

OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs

@@ -536,7 +536,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
             if (!m_InSelfDelete)
                 result.Abort();
 
-            result.Wait(TimeSpan.FromSeconds(10));
             lock (m_EventQueue)
             {
                 m_CurrentResult = null;