Turn off Layout for all blocks by default

[mrwweb]

The layout implementation for group blocks and others makes no sense as documented quite well in WordPress/gutenberg#31980.

Here's a good way to turn it off:

/**
 * Filter block type metadata to remove unwanted output from the editor.
 *
 * @param array $metadata Metadata for the currently processed block type.
 *
 * @return array Filtered metadata.
 */
public function filter_block_type_metadata( $metadata ) {

	/**
	 * Disable the layout panel for all blocks.
	 */
	if ( isset( $metadata['supports']['__experimentalLayout'] ) ) {
		$metadata['supports']['__experimentalLayout'] = false;
	}

	return $metadata;
}
	
add_filter( 'block_type_metadata', 'filter_block_type_metadata' );

[mrwweb]

After experimenting with the code snippet in the OG, it does not work as expected. It does effectively disable the "inherit layout" toggle, but it does so at the expense of allowing alignment of child blocks.

[mrwweb]

Now that WP 6.1 defaults to the "Constrained" layout type, this may no longer be an issue. I'm not quite ready to close the issue, but I'm removing it from the 2.10 milestone for further consideration.

[mrwweb]

I've been living with 6.1 for long enough that I'm convinced this issue has been resolved thanks to lobbying upstream! Yay!