Drop the deprecated (and unused) GroupMetadataEditor (#2978)

## Summary:

I was poking around at something today and noticed that this APIOption is not used anywhere _inside_ Perseus. I also checked Khan Academy source and its not passed in anywhere, so we can delete it and the supporting component.

Issue: "none"

## Test plan:

`pnpm test`
`pnpm typecheck`
`rg GroupMetadataEditor` (no matches)
`rg stub-tag-editor` (no imports of that now-unused component)

Author: jeremywiebe

Reviewers: SonicScrewdriver, handeyeco, ivyolamit, Myranae, mark-fitzgerald, nishasy

Required Reviewers:

Approved By: SonicScrewdriver

Checks: ✅ 10 checks were successful

Pull Request URL: #2978

Author: jeremywiebe

.changeset/famous-ties-march.md

@@ -0,0 +1,5 @@
+---
+"@khanacademy/perseus": major
+---
+
+Remove deprecated APIOption: GroupMetadataEditor

.changeset/spotty-pears-count.md

@@ -0,0 +1,5 @@
+---
+"@khanacademy/perseus-editor": patch
+---
+
+Update comment about GroupMetadataEditor (which is now gone)

packages/perseus-editor/src/iframe-content-renderer.tsx

@@ -170,7 +170,7 @@ class IframeContentRenderer extends React.Component<Props> {
             this._lastData = data;
 
             // We can't use JSON.stringify/parse for this because the apiOptions
-            // includes the functions GroupMetadataEditor, groupAnnotator, and onFocusChange.
+            // includes the functions groupAnnotator, and onFocusChange.
             // @ts-expect-error - TS2339 - Property 'iframeDataStore' does not exist on type 'Window & typeof globalThis'.
             window.iframeDataStore[this.iframeID] = data;
             frame.contentWindow.postMessage(this.iframeID, "*");

packages/perseus/src/components/__docs__/stub-tag-editor.stories.tsx

@@ -30,16 +30,13 @@
 import PropTypes from "prop-types";
 import * as React from "react";
 
-import StubTagEditor from "./components/stub-tag-editor";
-
 import type {APIOptionsWithDefaults} from "./types";
 
 export const ApiOptions = {
     propTypes: PropTypes.shape({
         isArticle: PropTypes.bool.isRequired,
 
         onFocusChange: PropTypes.func.isRequired,
-        GroupMetadataEditor: PropTypes.func.isRequired,
         showAlignmentOptions: PropTypes.bool.isRequired,
         readOnly: PropTypes.bool.isRequired,
 
@@ -133,7 +130,6 @@ export const ApiOptions = {
         isMobileApp: false,
         editingDisabled: false,
         onFocusChange: function () {},
-        GroupMetadataEditor: StubTagEditor,
         showAlignmentOptions: false,
         readOnly: false,
         groupAnnotator: function (): null {

packages/perseus/src/components/stub-tag-editor.tsx

@@ -143,8 +143,6 @@ export type ImageUploader = (
 
 export type Path = ReadonlyArray<string>;
 
-type StubTagEditorType = any; // from "./components/stub-tag-editor";
-
 type TrackInteractionArgs = {
     // The widget type that this interaction originates from
     type: string;
@@ -182,10 +180,6 @@ export type APIOptions = Readonly<{
         keypadHeight?: number,
         focusedElement?: HTMLElement,
     ) => unknown;
-    /**
-     * @deprecated - metadata is no longer used by the Group widget
-     */
-    GroupMetadataEditor?: React.ComponentType<StubTagEditorType>;
     showAlignmentOptions?: boolean;
     /**
      * A boolean that indicates whether the associated problem has been