[v11.0.x] XYChart2: Fix migration of pointSize fieldConfig (#87193)

XYChart: Fix default point size (#87192)

(cherry picked from commit ee4422d1e2)

Co-authored-by: Adela Almasan <88068998+adela-almasan@users.noreply.github.com>

public/app/plugins/panel/xychart/v2/migrations.ts

@@ -4,22 +4,6 @@ import { ScatterSeriesConfig, SeriesMapping, XYDimensionConfig, Options as PrevO
 
 import { XYSeriesConfig, Options } from './panelcfg.gen';
 
-// export const xyChartChangeHandler: PanelTypeChangedHandler = (
-//   panel,
-//   prevPluginId,
-//   prevOptions,
-//   prevFieldConfig
-// ): Options => {
-//   if (prevPluginId === 'xychart') {
-//     return migrateOptions({
-//       options: prevOptions,
-//       fieldConfig: prevFieldConfig,
-//     } as PanelModel);
-//   }
-
-//   return prevOptions as Options;
-// };
-
 export const xyChartMigrationHandler = (panel: PanelModel): Options => {
   const pluginVersion = panel?.pluginVersion ?? '';
 
@@ -245,14 +229,5 @@ function migrateOptions(panel: PanelModel): Options {
     series: newSeries,
   };
 
-  custDefaults.pointSize = custDefaults.pointSize.fixed;
-
-  // panel.fieldConfig = {
-  //   defaults,
-  //   overrides,
-  // };
-
-  // console.log('xyChartMigrationHandler', panel.options, newOptions);
-
   return newOptions;
 }