The method read_iccid in class CardBase should be put back to
legacy/cards.py. The reason for this is that it falls in the same
category like read_imsi, read_ki, etc. We should not use those old
methods in future programs since we have a more modern infrastructure
(lchan) now.
Also pySim-shell.py is the only caller of this method now. It is not
used in any other place.
Related: RT#67094
Change-Id: Ied3ae6fd107992abcc1b5ea3edb0eb4bdcd2f892
a42ee6f99d