editPost: deprecate __experimentalPluginPostExcerpt (#61188)

Co-authored-by: retrofox <retrofox@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: aaronrobertshaw <aaronrobertshaw@git.wordpress.org>
Co-authored-by: pdewouters <pauldewouters@git.wordpress.org>
Co-authored-by: ntsekouras <ntsekouras@git.wordpress.org>

packages/edit-post/src/deprecated.js

@@ -84,4 +84,17 @@ export function PluginSidebarMoreMenuItem( props ) {
 	deprecateSlot( 'PluginSidebarMoreMenuItem' );
 	return <EditorPluginSidebarMoreMenuItem { ...props } />;
 }
+
+/**
+ * @see PluginPostExcerpt in @wordpress/editor package.
+ */
+export function __experimentalPluginPostExcerpt() {
+	deprecated( 'wp.editPost.__experimentalPluginPostExcerpt', {
+		since: '6.6',
+		hint: 'Core and custom panels can be access programmatically using their panel name.',
+		link: 'https://developer.wordpress.org/block-editor/reference-guides/slotfills/plugin-document-setting-panel/#accessing-a-panel-programmatically',
+	} );
+	return null;
+}
+
 /* eslint-enable jsdoc/require-param */

packages/edit-post/src/index.js

@@ -14,20 +14,13 @@ import {
 	registerLegacyWidgetBlock,
 	registerWidgetGroupBlock,
 } from '@wordpress/widgets';
-import {
-	privateApis as editorPrivateApis,
-	store as editorStore,
-} from '@wordpress/editor';
+import { store as editorStore } from '@wordpress/editor';
 
 /**
  * Internal dependencies
  */
 import './hooks';
 import Editor from './editor';
-import { unlock } from './lock-unlock';
-
-const { PluginPostExcerpt: __experimentalPluginPostExcerpt } =
-	unlock( editorPrivateApis );
 
 /**
  * Initializes and returns an instance of Editor.
@@ -161,6 +154,6 @@ export function reinitializeEditor() {
 
 export { default as __experimentalFullscreenModeClose } from './components/header/fullscreen-mode-close';
 export { default as __experimentalMainDashboardButton } from './components/header/main-dashboard-button';
-export { __experimentalPluginPostExcerpt };
+
 export { store } from './store';
 export * from './deprecated';