Remove singly-used alias obviated by IdentifiedNode
ContextNode did not appear anywhere else in the code base.
@@ -18,7 +18,7 @@ import random
from rdflib.namespace import Namespace, RDF
from rdflib import plugin, exceptions, query, namespace
import rdflib.term
-from rdflib.term import BNode, Node, URIRef, Literal, Genid
+from rdflib.term import BNode, IdentifiedNode, Node, URIRef, Literal, Genid
from rdflib.paths import Path
from rdflib.store import Store
from rdflib.serializer import Serializer
@@ -43,9 +43,8 @@ assert Namespace # avoid warning
logger = logging.getLogger(__name__)
-# Type aliases to make unpacking what's going on a little more human friendly
-ContextNode = Union[BNode, URIRef]
-DatasetQuad = Tuple[Node, URIRef, Node, Optional[ContextNode]]
+# Type aliase to make unpacking what's going on a little more human friendly
+DatasetQuad = Tuple[Node, URIRef, Node, Optional[IdentifiedNode]]
__doc__ = """\
