I only want to delete the dependencies if they are not required by any package installed since then.
For example, when I installed subversion, it also installed some libs:
libapr1:amd64 libaprutil1:amd64 libneon27-gnutls:amd64 libsvn1:amd64
I want to purge them also along with subversion if this will not break my system.
I'm looking for an implicit way, eg. aptitude purge subversion and some switches to tell aptitude what I want.
My favourite package manager is pure aptitude.
How to do that on Debian Wheezy?