Removed a few annoying warnings

ScriptableRenderPipeline/LightweightPipeline/Editor/ShaderGUI/LightweightStandardGUI.cs

             public static readonly string[] specularSmoothnessChannelNames = {"Specular Alpha", "Albedo Alpha"};
         }
 
+        #pragma warning disable CS0414
         private MaterialProperty workflowMode = null;
         private MaterialProperty blendMode = null;
 
         private ColorPickerHDRConfig m_ColorPickerHDRConfig = new ColorPickerHDRConfig(0f, kMaxfp16, 1 / kMaxfp16, 3f);
 
         private bool m_FirstTimeApply = true;
+        #pragma warning restore CS0414
 
         public void FindProperties(MaterialProperty[] props)
         {

TestbedPipelines/Fptl/FptlLighting.cs

             }
             else
             {
+                #pragma warning disable CS0162
+                #pragma warning restore CS0162
             }
 
             CommandBuffer cmdShadow = CommandBufferPool.Get();
             }
             else
             {
+                #pragma warning disable CS0162
+                #pragma warning restore CS0162
             }
 
             // do deferred lighting