how do I delete grub on Ubuntu 11.10. I want to get into ubuntu normally without having to choose which operating system I would run. and how to remove ubuntu with older kernels as shown below
You can not delete or remove grub as grub is responsible for booting.
You can, however, configure grub to hide the menu.
And edit or add these lines
In terms of old kernels, remove them. either from the command line of software center.
Also, there seems to be some graphical utility called StartUpManager which allows to set the menu timeout and other settings: