Delete files that exist in the other panel

[Stefan Sorger <stso gmx at>]

Hi everyone!

I could swear that browsing the mc help I stumbled over a command 
that deletes all files in the left panel directory that exist in the right 
panel directory, comparing the files by size and/or timestamp.

I really need this now - but all searching and googling I can think of 
doesn't get me any clue... Please help me! Does this command exist 
at all or was it just my imagination?

Best regards, Stefan

(mc 4.6.1-pre3 on Debian Sarge)