function plt_hide_blockons_menus() {
//Hide the "Settings → Blockons Settings" menu.
remove_submenu_page('options-general.php', 'blockons-settings');
//Hide the "Settings → Upgrade" menu.
remove_submenu_page('options-general.php', 'blockons-settings-pricing');
}
add_action('admin_menu', 'plt_hide_blockons_menus', 1000000000);