Tips on Customizing WP Advanced Importer

How to Hide WP Advanced Importer Admin Menus

function plt_hide_wp_advanced_importer_menus() {
	//Hide "WP Advanced Importer".
	remove_menu_page('wp-advanced-importer');
	//Hide "WP Advanced Importer → Dashboard".
	remove_submenu_page('wp-advanced-importer', 'smack-uci-dashboard');
	//Hide "WP Advanced Importer → Import/Update".
	remove_submenu_page('wp-advanced-importer', 'smack-uci-import');
	//Hide "WP Advanced Importer → Settings".
	remove_submenu_page('wp-advanced-importer', 'smack-uci-settings');
	//Hide "WP Advanced Importer → Support".
	remove_submenu_page('wp-advanced-importer', 'smack-uci-support');
}

add_action('admin_menu', 'plt_hide_wp_advanced_importer_menus', 11);

Where do I put this code?

How to Hide WP Advanced Importer Dashboard Widgets

function plt_hide_wp_advanced_importer_dashboard_widgets() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Remove the "Ultimate-CSV-Importer-Pro-Activity" widget.
	remove_meta_box('uci_pro_dashboard_linechart', 'dashboard', 'high');
	//Remove the "Ultimate-CSV-Importer-Pro-Statistics" widget.
	remove_meta_box('uci_pro_dashboard_piechart', 'dashboard', 'high');
}

add_action('wp_dashboard_setup', 'plt_hide_wp_advanced_importer_dashboard_widgets', 20);