Set default blocks as default attributes

packages/block-library/src/query/block.json

@@ -20,11 +20,24 @@
 			"type": "array",
 			"default": [
 				{
-					"isValid": true,
-					"clientId": null,
-					"name": "post-title",
-					"attributes": {},
-					"innerBlocks": []
+					"name": "core/post-title",
+					"innerBlocks": [],
+					"isValid": true
+				},
+				{
+					"name": "core/post-date",
+					"innerBlocks": [],
+					"isValid": true
+				},
+				{
+					"name": "core/post-author",
+					"innerBlocks": [],
+					"isValid": true
+				},
+				{
+					"name": "core/post-excerpt",
+					"innerBlocks": [],
+					"isValid": true
 				}
 			]
 		}

packages/block-library/src/query/edit.js

@@ -20,19 +20,12 @@ import {
 	InspectorControls,
 	WritingFlow,
 } from '@wordpress/block-editor';
-import { cloneBlock, createBlock } from '@wordpress/blocks';
+import { cloneBlock } from '@wordpress/blocks';
 import { PanelBody, Placeholder, Spinner } from '@wordpress/components';
 import { compose } from '@wordpress/compose';
 import { EntityProvider } from '@wordpress/core-data';
 import { withSelect } from '@wordpress/data';
 
-const defaultFields = [
-	'core/post-title',
-	'core/post-date',
-	'core/post-author',
-	'core/post-excerpt',
-];
-
 class Edit extends Component {
 	constructor( props ) {
 		super( props );
@@ -49,7 +42,6 @@ class Edit extends Component {
 
 	componentDidMount() {
 		this.createBlockTree();
-		this.updateBlocks( defaultFields.map( ( f ) => createBlock( f ) ) );
 	}
 
 	componentDidUpdate( prevProps ) {
@@ -69,9 +61,7 @@ class Edit extends Component {
 				[ post.id ]:
 					post.id === editingPost
 						? blocksTree[ post.id ]
-						: blocks.map( ( block ) =>
-								cloneBlock( block, { post } )
-						  ),
+						: blocks.map( ( block ) => cloneBlock( block ) ),
 			} ),
 			{}
 		);