Remove gutenberg core blocks.

gistfile1.txt

// Array of blocks to hide. 
// This could come from anywhere - we use localize script and change the blocks to hide depending on post type.
const hiddenBlocks = [ 'hm/myBlock' ];

// Use function below to filter block settings.
// Will hide all 'hiddenBlocks' from the inserter UI
// But if those blocks are already present, or somehow get into the content, they will still work.
wp.hooks.addFilter(
	'blocks.registerBlockType',
	'hm-gb-blocks/modify-core-blocks',
	( settings, blockName ) => {
		if ( hiddenBlocks.indexOf( blockName ) === -1 ) {
			return settings;
		}

		return {
			...settings,
			supports: {
				...settings.supports || {},
				inserter: false,
			},
		};
	},
	50
);