Remove legacy sqlite lines added internally by OpenSimulator to the [Startup] section.

These are long unused but confusingly will be seen in the [Startup] section on a "config save".

OpenSim/Framework/ConfigSettings.cs

@@ -31,7 +31,6 @@ namespace OpenSim.Framework
     {
         public string PhysicsEngine                 { get; set; }
         public string MeshEngineName                { get; set; }
-        public string StorageDll                    { get; set; }
         public string ClientstackDll                { get; set; }
         public string LibrariesXMLFile              { get; set; }