cleanup: remove unused queue setting (#7353)

## Summary

Removes setting which no longer has any effect due to the Queue panel
being removed.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7353-cleanup-remove-unused-queue-setting-2c66d73d36508100b514f07e16d5b0f6)
by [Unito](https://www.unito.io)

src/platform/settings/constants/coreSettings.ts

@@ -327,13 +327,6 @@ export const CORE_SETTINGS: SettingParams[] = [
     type: 'hidden',
     defaultValue: {}
   },
-  // Hidden setting used by the queue for how to fit images
-  {
-    id: 'Comfy.Queue.ImageFit',
-    name: 'Queue image fit',
-    type: 'hidden',
-    defaultValue: 'cover'
-  },
   {
     id: 'Comfy.GroupSelectedNodes.Padding',
     category: ['LiteGraph', 'Group', 'Padding'],