Hi,
Try this PHP snippet.
add_action( 'wp_enqueue_scripts', 'remove_generateblocks_css', 100 );
function remove_generateblocks_css() {
wp_dequeue_style( 'generateblocks' );
}
This removes the <link rel="stylesheet" id="generateblocks-css" href="//yoursite.domain/wp-content/uploads/generateblocks/style-123.css?ver=1606345434" media="all"> the plugins adds.
As for the <style> it generates. I’m afraid there’s no way of removing it without editing the plugin.
See this line: https://github.com/tomusborne/generateblocks/blob/bd7c9f3690c8e50d109602952a42a1d2417d3528/includes/class-enqueue-css.php#L130