How to remove OS Boot Options from GRUB 2

Well due to number of updates, my ubuntu installation was showing numbers of OS boot options and I had to clean up the boot options. With new grub2, removing the older kernel packages from synaptic package manager is sufficient to remove these extra entries from grub. All you have to do is remove the kernel package and then update grub configuration.

In my case, I'll be removing the kernel package version 2.6.35-23 generic so I do search for it in the synaptic package manager.

Now from the search result, I chose the 2.6.35-23 generic and then right clicked and selected Mark for Complete Removal option. Now, we just need to apply the changes and wait for few minutes while everything is being done. The update-grub is done automatically and in case, it is not done, you can do sudo update-grub from terminal.

I hope this helps you. Enjoy :)