Removing unused space.py

This was introduced in 62d9fc970a0bc8ef677924b90b463cd6d713dfee,
presumably over the sprint - it looks more like API proposal from the
pre-PR days, so I'm deleting in favour of something tested/integrated
being introduced via PR
Merge pull request #55 from py3minepi/feature/space-cleanup

Removing unused space.py