I don't need this update, but it's broken and keeps reminding me

[Dave M G]

Ubuntu Users,

This morning in the usual bundle of updates, I upgraded to kernel 
2.6.20-15-generic, among other things.

When the updates were all done, I noticed that the orange update icon 
was still there. I clicked it again, and it said I had one distribution 
update to download:
linux-image-2.6.20-14-generic.

I thought that was odd, but I selected to update anyway, but it stopped 
on an error, saying:

W: Failed to fetch 
http://archive.ubuntu.com/ubuntu/pool/main/l/linux-source-2.6.20/linux-image-2.6.20-14-generic_2.6.20-14.23_i386.deb
  403 Forbidden [IP: 91.189.88.31 80]

I figured maybe there was an error in the repository or something, so I 
tried switching to another repository. But this one package still comes up.

It won't download, and it won't go away.

And, unless there's something I don't understand here, I don't need it 
anyway since I'm now at a more recent kernel.

What can I do about this annoying non-update?

-- 
Dave M G
Ubuntu 7.04 Feisty Fawn
Kernel 2.6.20-15-generic
Pentium D Dual Core Processor