Remove support for heading block

lib/experimental/blocks.php

@@ -101,7 +101,6 @@ function gutenberg_render_block_connections( $block_content, $block, $block_inst
 		$blocks_attributes_allowlist = array(
 			'core/paragraph' => array( 'content' ),
 			'core/image'     => array( 'url' ),
-			'core/heading' => array( 'content' ),
 		);
 
 		// Whitelist of the block types that support block connections.

packages/block-editor/src/hooks/custom-fields.js

@@ -56,11 +56,7 @@ const withCustomFieldsControls = createHigherOrderComponent( ( BlockEdit ) => {
 
 		// Check if the current block is a paragraph or image block.
 		// Currently, only these two blocks are supported.
-		if (
-			! [ 'core/paragraph', 'core/image', 'core/heading' ].includes(
-				props.name
-			)
-		) {
+		if ( ! [ 'core/paragraph', 'core/image' ].includes( props.name ) ) {
 			return <BlockEdit { ...props } />;
 		}
 
@@ -70,7 +66,6 @@ const withCustomFieldsControls = createHigherOrderComponent( ( BlockEdit ) => {
 		let attributeName;
 		if ( props.name === 'core/paragraph' ) attributeName = 'content';
 		if ( props.name === 'core/image' ) attributeName = 'url';
-		if ( props.name === 'core/heading' ) attributeName = 'content';
 
 		const connectionSource =
 			props.attributes?.connections?.attributes?.[ attributeName ]

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

@@ -14,7 +14,7 @@
 		"content": {
 			"type": "string",
 			"source": "html",
-			"selector": "h2",
+			"selector": "h1,h2,h3,h4,h5,h6",
 			"default": "",
 			"__experimentalRole": "content"
 		},
@@ -63,8 +63,7 @@
 			}
 		},
 		"__unstablePasteTextInline": true,
-		"__experimentalSlashInserter": true,
-		"__experimentalConnections": true
+		"__experimentalSlashInserter": true
 	},
 	"editorStyle": "wp-block-heading-editor",
 	"style": "wp-block-heading"