There was a huge debate on Digging into WordPress blog whether developers should let their client’s upgrade or not. We believe to educate our clients and encourage them to be self-sufficient therefore we have created an infographic that shows you a step by step guide to upgrade WordPress. For Backing up WordPress, we recommend using BackupBuddy Plugin to our clients. But we do have clients that do not want to deal with maintenance updates, so they want us to take care of them therefore we also have that option available. For these clients, we hide the WordPress Upgrade Message.
All you have to do is simply open the theme’s functions.php file and add this: