Disable only one Gutenberg block programatically / coblock/maps not listed in blocks

You’ll want to target the block specifically via javascript. Brief example:

wp.domReady(function() {
    wp.blocks.unregisterBlockType( 'coblocks/map' );
});

Save that to a js file and enqueue it via your custom function: add_action('enqueue_block_editor_assets', 'your_custom_enqueue_fucntion')