Remove Gutenberg blocks

Add the following code to only allow some Gutenberg blocks to your WordPress site.

add_filter('allowed_block_types', 'setAllowedBlocks');

function setAllowedBlocks($allowed_blocks) {
	$allowed_blocks = array(
        'core/image',
		'core/paragraph',
		'core/heading',
		'core/list'
	);

	return $allowed_blocks;
}

Full list of all available blocks with the categories text, media, design, widgets and embeds:

• core/paragraph
• core/heading
• core/list
• core/quote
• core/code
• core/freeform
• core/preformatted
• core/pullquote
• core/table
• core/verse

• core/image
• core/gallery
• core/audio
• core/cover
• core/file
• core/media-text
• core/video

• core/buttons
• core/columns
• core/group
• core/text-columns
• core/more
• core/nextpage
• core/separator
• core/spacer

• core/shortcode
• core/archives
• core/calendar
• core/categories
• core/html
• core/latest-comments
• core/latest-posts
• core/rss
• core/social-links
• core/tag-cloud
• core/search

• core/embed