Revert "Add pyoxigraph python package"

This reverts commit 7e4aeebec1.

python/pyoxigraph/__init__.py

@@ -1,6 +0,0 @@
-from .pyoxigraph import __author__, __version__
-from .models import NamedNode, BlankNode, Literal, Triple, Quad, DefaultGraph
-from .parse import parse
-from .serialize import serialize
-from .store import Store
-from .sparql import Variable, QuerySolutions, QuerySolution, QueryTriples