Fixed UUM-72471: Can't add a Scene to a Baking Set when it has just b…

JIRA: https://jira.unity3d.com/browse/UUM-72471

Actual deletion code was missing from the onRemoveCallback of the ReorderedList.

Author: YvainRaeymaekers

Packages/com.unity.render-pipelines.core/Editor/Lighting/ProbeVolume/ProbeVolumeLightingTab.cs

@@ -616,9 +616,9 @@ void InitializeSceneList()
 
                 onRemoveCallback = (list) =>
                 {
+                    var guid = (string)list.list[list.index];
+                    activeSet.RemoveScene(guid);
                     Undo.RegisterCompleteObjectUndo(new Object[] { activeSet }, "Deleted scene in baking set");
-
-                    ReorderableList.defaultBehaviours.DoRemoveButton(list);
                     EditorUtility.SetDirty(activeSet);
                 },
 
@@ -1191,7 +1191,7 @@ bool IsVisible()
                 EnableGroupBox(probeDistanceGroupBox, debug.drawBricks);
                 EnableGroupBox(probeSamplingGroupBox, debug.drawProbeSamplingDebug);
                 EnableTextArea(vertexSamplingWarning, ProbeReferenceVolume.instance.vertexSampling);
-                
+
                 if (debugLayers && m_LayerToggles != null)
                 {
                     if (bakingSet.bakedMaskCount != 1)