clean up PR

ScriptableRenderPipeline/Core/CoreRP/CoreUtils.cs

 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.Remoting.Messaging;
 using UnityEngine.Rendering;
 using UnityEngine.Rendering.PostProcessing;
 

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Decal/DecalProjectorComponent.cs

 using System;
 using UnityEditor;
 using UnityEngine;
-using UnityEngine.UI;
-using UnityEngine.EventSystems;// Required when using Event data.
 
 namespace UnityEngine.Experimental.Rendering.HDPipeline
 {

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Decal/DecalSystem.cs

             }
         }
         
-        Mesh m_DecalMesh = null;
-        CullingGroup m_CullingGroup = null;
+        private Mesh m_DecalMesh = null;
+        private CullingGroup m_CullingGroup = null;
 		private const int kDecalBlockSize = 128;
 		private BoundingSphere[] m_BoundingSpheres = new BoundingSphere[kDecalBlockSize];
 		private DecalProjectorComponent[] m_Decals = new DecalProjectorComponent[kDecalBlockSize];

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipelineAsset.asset

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