[Trisquel-users] Why do some old kernels still stay?

[rhutter]

There's a forum thread called "Old kernels" that i would like to continue,  
but it's closed. Why?
In my case, i've upgraded to kernel 3.13.0-68 recently and run apt-get  
dist-upgrade twice in the last few weeks, before and after that upgrade. I've  
also run autoremove and autoremove --purge.
But still, not only kernel 67, but also 65 and 63 are still shown as  
installed by Synaptic. Do i really have to remove them manually in Synaptic?  
Or do i need them for something?
This is Trisquel mini.