Also remove these versioned provides since we implicitly support that now and tea/cli lost the code that supports this for the provides key at some point. However the pip one we would still need and we don't support that in tea/cli
The default would be python-prefix, which is rubbish. We could mangle this to TEA_PREFIX/python.org which is also fairly rubbish. TEA_PREFIX is a possible, but still lame. ~/.local is a standard and our magic adds the bin there to PATH
