Stop auto-focusing Navigation block in Navigation screen. (#25592)

I also added a JSDoc comment while I was at it.

packages/edit-navigation/src/components/editor/block-view.js

@@ -1,26 +1,16 @@
 /**
  * WordPress dependencies
  */
-import { useSelect, useDispatch } from '@wordpress/data';
-import { useEffect } from '@wordpress/element';
-import { WritingFlow, ObserveTyping, BlockList } from '@wordpress/block-editor';
+import { BlockList, ObserveTyping, WritingFlow } from '@wordpress/block-editor';
 import { Spinner } from '@wordpress/components';
 
+/**
+ * The current navigation rendered in the form of a core Navigation block.
+ *
+ * @param {Object} props Component props.
+ * @param {boolean} props.isPending Whether the navigation post has loaded.
+ */
 export default function BlockView( { isPending } ) {
- const rootClientId = useSelect(
- ( select ) => select( 'core/block-editor' ).getBlocks()[ 0 ]?.clientId,
- []
- );
-
- const { selectBlock } = useDispatch( 'core/block-editor' );
-
- // Select the root Navigation block when it becomes available.
- useEffect( () => {
- if ( rootClientId ) {
- selectBlock( rootClientId );
- }
- }, [ rootClientId, selectBlock ] );
-
  return (
  <div className="edit-navigation-editor__block-view">
  { isPending ? (