Tips on Customizing Disable Admin Notices – Hide Dashboard Notifications

How to Hide Disable Admin Notices Individually Admin Menus

function plt_hide_disable_admin_notices_menus() {
	//Hide "Settings → Hide admin notices".
	remove_submenu_page('options-general.php', 'wdan_settings-wbcr_dan');
	//Hide "Hidden notices".
	remove_menu_page('wdan-notices-wbcr_dan');
	//Hide "Block ad redirects".
	remove_menu_page('wdanp-edit-redirects-wbcr_dan');
	//Hide "Hide admin bar items".
	remove_menu_page('wdanp-edit-admin-bar-wbcr_dan');
}

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

Where do I put this code?

How to Hide the "WordPress Guides/Tutorials" Dashboard Widget

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

	//Remove the "WordPress Guides/Tutorials" widget.
	remove_meta_box('themeisle', 'dashboard', 'normal');
}

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