Remove FormerlySerializedAs from HDAdditionalData to not pollute with dev stuff

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/HDAdditionalLightData.cs

         [SerializeField]
         float m_Version = 1.0f;
  #pragma warning restore 414
-            
+
-        [FormerlySerializedAs("m_innerSpotPercent")]
         public float m_InnerSpotPercent = 0.0f; // To display this field in the UI this need to be public
 
         public float GetInnerSpotPercent01()
         public bool affectDiffuse = true;
         public bool affectSpecular = true;
 
-        [FormerlySerializedAs("archetype")]
         public LightTypeExtent lightTypeExtent = LightTypeExtent.Punctual;
 
         // Only for Spotlight, should be hide for other light
-        [FormerlySerializedAs("lightWidth")]
-        [FormerlySerializedAs("lightHeight")]
         public float shapeHeight = 0.5f;
 
         // Only for pyramid projector