remove ScopedTFGraph destructor. no carsh occurs any more.

src/TensorFlowNET.Core/Framework/Models/ScopedTFGraph.cs

@@ -6,10 +6,5 @@
         {
 
         }
-
-        ~ScopedTFGraph()
-        {
-            base.Dispose();
-        }
     }
 }

src/TensorFlowNET.Core/Graphs/Graph.cs

@@ -445,7 +445,6 @@ namespace Tensorflow
 
         protected override void DisposeUnManagedState(IntPtr handle)
         {
-            Console.WriteLine($"Destroy graph {handle}");
             c_api.TF_DeleteGraph(handle);
         }