cleared warnings in the UnitTest project

test/TensorFlowNET.UnitTest/PythonTest.cs

@@ -126,7 +126,6 @@ namespace TensorFlowNET.UnitTest
             if (tensors == null)
                 return null;
             return nest.map_structure(self._eval_tensor, tensors);
-            return null;
         }
 
         protected object _eval_tensor(object tensor)
@@ -145,7 +144,7 @@ namespace TensorFlowNET.UnitTest
                     //                                                tensor.dense_shape)
                     //return (tensor as Tensor).numpy();
                 }
-                catch (Exception e)
+                catch (Exception)
                 {
                     throw new ValueError("Unsupported type: " + tensor.GetType());
                 }

test/TensorFlowNET.UnitTest/control_flow_ops_test/SwitchTestCase.cs

@@ -18,10 +18,12 @@ namespace TensorFlowNET.UnitTest.control_flow_ops_test
             //var embedding_matrix = variable_scope.get_variable(
                 //"embedding_matrix", initializer: new double[,] { { 2.0 }, { 3.0 } }, use_resource: true);
 
+            /*
             Tensor cond(Tensor it, Tensor _)
             {
                 return it < 5;
             }
+            */
 
             // TODO: below code doesn't compile
             //(Tensor, Tensor) body(Tensor it, Tensor cost)

test/TensorFlowNET.UnitTest/ops_test/ControlDependenciesTest.cs

@@ -39,7 +39,7 @@ namespace TensorFlowNET.UnitTest.ops_test
         [TestMethod]
         public void TestEager()
         {
-            Tensor a = null, c = null, d = null, e = null;
+            Tensor a = null, c = null;
             object b = null;
             var calls = 0;
             Func<Tensor> future = () =>