tests: Remove test_pkg.py - it is replaced by test_planex_spec.py
tests: Remove test_pkg.py - it is replaced by test_planex_spec.py

Signed-off-by: Euan Harris <c3b6e83069c8e9e3af49a38fec6026be89559638@citrix.com>

djs55/planex,djs55/planex,djs55/planex