When including Redux in a theme for a client, this removes the nags and notices.

redux-framework-cleaner.php

<?php
/**
 * Disable News Blast
 */
$GLOBALS['redux_notice_check'] = false;

/**
 * Disable Update Notice
 */
$GLOBALS['redux_update_check'] = false;

/**
 * Hide the Tools Submenu
 */
add_action( 'admin_menu', 'remove_redux_menu', 12 );
function remove_redux_menu() {
	remove_submenu_page( 'tools.php', 'redux-about' );
}

add_action( 'init', 'sg_redux_framework_cleanup' );
function sg_redux_framework_cleanup() {
	// Remove demo notices
	if ( class_exists( 'ReduxFrameworkPlugin' ) ) {
		remove_filter( 'plugin_row_meta', array( ReduxFrameworkPlugin::instance(), 'plugin_metalinks' ), null, 2 );
		remove_action( 'admin_notices', array( ReduxFrameworkPlugin::instance(), 'admin_notices' ) );
	}
	// Remove tracking
	if ( class_exists( 'Redux_Tracking' ) ) {
		// Remove the tracking request notice.
		remove_action( 'admin_enqueue_scripts', array( Redux_Tracking::get_instance(), '_enqueue_tracking' ) );
		// Remove the newsletter tracking nag.
		remove_action( 'admin_enqueue_scripts', array( Redux_Tracking::get_instance(), '_enqueue_newsletter' ) );
	}
}

Thank you.