def remove_contact(jid)
      bare = JID.new(jid).bare
      @roster.reject! {|c| c.jid.bare == bare }
    end
def remove_contact(jid)
      bare = JID.new(jid).bare
      @roster.reject! {|c| c.jid.bare == bare }
    end
Removes the contact with this jid from the user's roster.