fix HDAdditionalReflectionData namespace

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

 using UnityEngine;
-using UnityEngine.Experimental.Rendering;
-using UnityEditor.Experimental.Rendering.HDPipeline;
+using UnityEngine.Experimental.Rendering.HDPipeline;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline
 {
         internal SerializedProperty multiplier;
 
         internal SerializedProperty proxyVolumeComponent;
-        
+
         internal SerializedInfluenceVolume influenceVolume;
 
         public SerializedHDReflectionProbe(SerializedObject so, SerializedObject addso)
             farClip = so.FindProperty("m_FarClip");
             boxProjection = so.FindProperty("m_BoxProjection");
             legacyBlendDistance = so.FindProperty("m_BlendDistance");
-            
+
-            
+
         }
 
         public void Update()

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

 using UnityEngine.Serialization;
-using UnityEngine.Experimental.Rendering.HDPipeline;
-namespace UnityEngine.Experimental.Rendering
+namespace UnityEngine.Experimental.Rendering.HDPipeline
 {
     [RequireComponent(typeof(ReflectionProbe))]
     [ExecuteInEditMode]