function plt_hide_combo_blocks_menus() {
//Hide the "Combo Blocks" menu.
remove_menu_page('combo-blocks');
//Hide the "Combo Blocks → Combo Blocks" menu.
remove_submenu_page('combo-blocks', 'combo-blocks');
//Hide the "Combo Blocks → Overview" menu.
remove_submenu_page('combo-blocks', 'combo-blocks-overview');
}
add_action('admin_menu', 'plt_hide_combo_blocks_menus', 11);