Deactivate Gutenberg editor including all unnecessary files - WordPress

Deactivate Gutenberg editor - WordPress

// Deregister block styles
function yl_deregister_gutenberg_block_styles() {
    wp_dequeue_style('wp-block-library');
    wp_deregister_style('wp-block-library');
}

add_filter('use_block_editor_for_post', '__return_false', 10);
add_filter('use_block_editor_for_post_type', '__return_false', 10);
add_action('wp_print_styles', 'yl_deregister_gutenberg_block_styles', 100);


// Remove Gutenberg CSS
function yl_remove_gutenberg_assets() {
    wp_dequeue_style('wp-block-library');
}

add_action('wp_enqueue_scripts', 'yl_remove_gutenberg_assets', 100);


// Disables the block editor from managing widgets in the Gutenberg plugin
add_filter( 'gutenberg_use_widgets_block_editor', '__return_false' );


// Disables the block editor from managing widgets
add_filter('use_widgets_block_editor', '__return_false');