Remove ceilometer tool show_data.py since it is not usable
Remove ceilometer tool show_data.py since it is not usable

It removed the ceilometer tool show_data.py since it is not
usable.

Change-Id: I8230c3b7f4c14ec406df713b4a0bbb329fe6d66f
Closes-Bug: 1637056

openstack/ceilometer,openstack/ceilometer