Remove extraneous attributes on LegacyDialog's DialogButton (#1108)

* Remove extraneous attributes

* Update CHANGELOG.md

Author: keveleigh

org.mixedrealitytoolkit.uxcore/CHANGELOG.md

@@ -2,6 +2,12 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## Unreleased
+
+### Fixed
+
+* Fixed "Attribute 'SerializeField' is not valid on this declaration type. It is only valid on 'field' declarations" error on `DialogButton` in Unity 6.3. [PR #1108](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1108)
+
 ## [3.3.0] - 2025-11-12
 
 ### Added

org.mixedrealitytoolkit.uxcore/LegacyDialog/DialogButton.cs

@@ -11,13 +11,12 @@ namespace MixedReality.Toolkit.UX.Deprecated
     /// Handling click event and dismiss dialog
     /// </summary>
     /// <remarks>
-    /// This and the <see cref="MixedReality.Toolkit.UX.Deprecated.Dialog">Legacy Dialog</see> are deprecated. Please migrate to the 
-    /// new <see cref="MixedReality.Toolkit.UX.Dialog">Dialog</see>. If you'd like to continue using the 
-    /// <see cref="MixedReality.Toolkit.UX.Deprecated.Dialog">Legacy Dialog</see> implementation, it is recommended that the legacy code 
-    /// be copied to the application's code base, and maintained independently by the application developer. Otherwise, it is strongly recommended 
+    /// This and the <see cref="MixedReality.Toolkit.UX.Deprecated.Dialog">Legacy Dialog</see> are deprecated. Please migrate to the
+    /// new <see cref="MixedReality.Toolkit.UX.Dialog">Dialog</see>. If you'd like to continue using the
+    /// <see cref="MixedReality.Toolkit.UX.Deprecated.Dialog">Legacy Dialog</see> implementation, it is recommended that the legacy code
+    /// be copied to the application's code base, and maintained independently by the application developer. Otherwise, it is strongly recommended
     /// that the application be updated to use the new <see cref="MixedReality.Toolkit.UX.DialogPool">DialogPool</see> system.
     /// </remarks>
-    [SerializeField, Tooltip("The TextMeshPro component for displaying text on the button itself.")]
     [Obsolete("This legacy dialog system has been deprecated. Please migrate to the new dialog system, see MixedReality.Toolkit.UX.DialogPool for more details.")]
     public class DialogButton : MonoBehaviour
     {

org.mixedrealitytoolkit.uxcore/package.json

@@ -1,6 +1,6 @@
 {
   "name": "org.mixedrealitytoolkit.uxcore",
-  "version": "3.3.0-development",
+  "version": "3.3.1-development",
   "description": "Core interaction and visualization scripts for building MR UI components. Intended to be consumed when building UX libraries. For pre-existing library of components, see the UX Components package.",
   "displayName": "MRTK UX Core Scripts",
   "msftFeatureCategory": "MRTK3",