Fortunately, a new graphical tool has made this process easy and straightforward!
Installing Grub Customizer
The tool in question is called Grub Customizer, created by Daniel Richter.
He’s provided a PPA to makeinstalling the tool quick and easy.
Grub Customizer will now show up in the Applications > System Tools menu.
Or you’re able to open it from the command line.
To hide entries that you don’t want to see anymore, simply uncheck the checkbox next to them.
smack the Save button at the top-left to make your changes permanent.
Customize Grub Behavior
Grub Customizer can do much more than hide boot menu entries!
Opening up the Preferences window lets you customize almost every aspect of Grub.
Grub Customizer is a great addition to any Linux installation that uses Grub2!
Thanks to How-To Geek commenter Hugues for recommending this program!
See this Ubuntu Forums post for more detailed information on Grub Customizer.