Suppress CS0168 (Variable is declared but never used)

src/TensorFlowNET.Core/Operations/Distributions/distribution.py.cs

@@ -64,12 +64,16 @@ namespace Tensorflow
                 {
                     return _log_prob(value);
                 }
+#pragma warning disable CS0168 // Variable is declared but never used
                 catch (Exception e1)
+#pragma warning restore CS0168 // Variable is declared but never used
                 {
                     try
                     {
                         return math_ops.log(_prob(value));
+#pragma warning disable CS0168 // Variable is declared but never used
                     } catch (Exception e2)
+#pragma warning restore CS0168 // Variable is declared but never used
                     {
                         throw new NotImplementedException();
                     }

src/TensorFlowNET.Keras/Model.cs

@@ -50,7 +50,9 @@ namespace Tensorflow.Keras
             {
                 return Flow;
             }
+#pragma warning disable CS0168 // Variable is declared but never used
             catch (Exception ex)
+#pragma warning restore CS0168 // Variable is declared but never used
             {
                 return null;
             }