Tips on Customizing Contact Form Plugin by Fluent Forms for Quiz, Survey, and Drag & Drop WP Form Builder

How to Hide Fluent Forms Admin Menus

function plt_hide_fluentform_menus() {
	//Hide "Tools → Scheduled Actions".
	remove_submenu_page('tools.php', 'action-scheduler');

	//Hide "Fluent Forms".
	remove_menu_page('fluent_forms');
	//Hide "Fluent Forms → Forms".
	remove_submenu_page('fluent_forms', 'fluent_forms');
	//Hide "Fluent Forms → New Form".
	remove_submenu_page('fluent_forms', 'fluent_forms#add=1');
	//Hide "Fluent Forms → Entries".
	remove_submenu_page('fluent_forms', 'fluent_forms_all_entries');
	//Hide "Fluent Forms → Global Settings".
	remove_submenu_page('fluent_forms', 'fluent_forms_settings');
	//Hide "Fluent Forms → Tools".
	remove_submenu_page('fluent_forms', 'fluent_forms_transfer');
	//Hide "Fluent Forms → SMTP".
	remove_submenu_page('fluent_forms', 'fluent_forms_smtp');
	//Hide "Fluent Forms → Integrations".
	remove_submenu_page('fluent_forms', 'fluent_forms_add_ons');
	//Hide "Fluent Forms → Support".
	remove_submenu_page('fluent_forms', 'fluent_forms_docs');
}

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

Where do I put this code?

How to Hide the "Fluent Forms Latest Form Submissions" Dashboard Widget

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

	//Remove the "Fluent Forms Latest Form Submissions" widget.
	remove_meta_box('fluentform_stat_widget', 'dashboard', 'normal');
}

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