Remove warnings

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/HDReflectionProbeEditor.cs

         SerializedObject m_AdditionalDataSerializedObject;
         internal HDReflectionProbeUI m_UIState = new HDReflectionProbeUI();
 
-        int m_PositionHash = 0;
-
         public bool sceneViewEditing
         {
             get { return HDProbeUI.IsProbeEditMode(EditMode.editMode) && EditMode.IsOwner(this); }

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/SerializedHDProbe.cs

     internal abstract class SerializedHDProbe
     {
         internal SerializedObject serializedObject;
-
-        internal SerializedReflectionProxyVolumeComponent proxyVolumeComponent;
+        
         internal SerializedProperty proxyVolumeReference;
         internal SerializedProperty infiniteProjection;