function plt_hide_acf_blocks_menus() {
//Hide the "ACF Blocks" menu.
remove_menu_page('acf-blocks');
//Hide the "ACF Blocks → ACF Blocks" menu.
remove_submenu_page('acf-blocks', 'acf-blocks');
//Hide the "ACF Blocks → Contact Us" menu.
remove_submenu_page('acf-blocks', 'acf-blocks-contact');
}
add_action('admin_menu', 'plt_hide_acf_blocks_menus', 1000000000);