killing the bogus "convert tags" heads in linux-2.6 hg mirror

[Jeremy Fitzhardinge]

Is there any reason those heads can't just be pruned out?  We have the 
technology now, right?

They shouldn't be the parents to anything, so there's no subsequent 
history based from them.  The mirror is read-only, so it shouldn't be 
possible to reinfect it from other people's clones.

This looks like a pretty low-impact thing to do, or am I missing something?

    J