Remove old kernels

[elk dolk]

Hi all,

I have updated my desktop to 2.6.31-19-generic kernel. How can I remove the following old versions which still GRUB shows to me during boot :


 2.6.31-17-generic
 2.6.31-17-generic recovery mode
 2.6.31-16-generic
 2.6.31-16-generic recovery mode
 2.6.31-15-generic
 2.6.31-15-generic recovery mode
 2.6.31-14-generic
 2.6.31-14-generic recovery mode

elk