Remove `(TypeCheck|SubjectType|PredicateType|ObjectType)Error` and related

Also remove
`check_(context|subject|predicate|object|statement|pattern)`.

It seems nothing is using these exceptions and functions.

Technically this does remove parts of the public API, but I would argue
they are "buggy" parts as anything that use them would be sorely
disappointed to find that the behaviour is not as expect, and these
functions/exceptions don't serve any function related to the aim of
RDFLib unless they are integrated with the rest of RDFLib.

1 files changed, 0 insertions, 68 deletions

diff --git a/rdflib/util.py b/rdflib/util.py
index 7341a12f..a77d7300 100644
--- a/rdflib/util.py
+++ b/rdflib/util.py
@@ -18,15 +18,6 @@ Date/time utilities
 * date_time
 * parse_date_time
 
-Statement and component type checkers
-
-* check_context
-* check_subject
-* check_predicate
-* check_object
-* check_statement
-* check_pattern
-
 """
 
 from calendar import timegm
@@ -41,10 +32,6 @@ from time import timezone
 
 from os.path import splitext
 
-from rdflib.exceptions import ContextTypeError
-from rdflib.exceptions import ObjectTypeError
-from rdflib.exceptions import PredicateTypeError
-from rdflib.exceptions import SubjectTypeError
 import rdflib.graph  # avoid circular dependency
 from rdflib.namespace import Namespace, XSD
 from rdflib.namespace import NamespaceManager
@@ -62,12 +49,6 @@ __all__ = [
     "from_n3",
     "date_time",
     "parse_date_time",
-    "check_context",
-    "check_subject",
-    "check_predicate",
-    "check_object",
-    "check_statement",
-    "check_pattern",
     "guess_format",
     "find_roots",
     "get_tree",
@@ -235,55 +216,6 @@ def from_n3(s: str, default=None, backend=None, nsm=None):
         return BNode(s)
 
 
-def check_context(c):
-    if not (isinstance(c, URIRef) or isinstance(c, BNode)):
-        raise ContextTypeError("%s:%s" % (c, type(c)))
-
-
-def check_subject(s):
-    """Test that s is a valid subject identifier."""
-    if not (isinstance(s, URIRef) or isinstance(s, BNode)):
-        raise SubjectTypeError(s)
-
-
-def check_predicate(p):
-    """Test that p is a valid predicate identifier."""
-    if not isinstance(p, URIRef):
-        raise PredicateTypeError(p)
-
-
-def check_object(o):
-    """Test that o is a valid object identifier."""
-    if not (isinstance(o, URIRef) or isinstance(o, Literal) or isinstance(o, BNode)):
-        raise ObjectTypeError(o)
-
-
-def check_statement(triple):
-    (s, p, o) = triple
-    if not (isinstance(s, URIRef) or isinstance(s, BNode)):
-        raise SubjectTypeError(s)
-
-    if not isinstance(p, URIRef):
-        raise PredicateTypeError(p)
-
-    if not (isinstance(o, URIRef) or isinstance(o, Literal) or isinstance(o, BNode)):
-        raise ObjectTypeError(o)
-
-
-def check_pattern(triple):
-    (s, p, o) = triple
-    if s and not (isinstance(s, URIRef) or isinstance(s, BNode)):
-        raise SubjectTypeError(s)
-
-    if p and not isinstance(p, URIRef):
-        raise PredicateTypeError(p)
-
-    if o and not (
-        isinstance(o, URIRef) or isinstance(o, Literal) or isinstance(o, BNode)
-    ):
-        raise ObjectTypeError(o)
-
-
 def date_time(t=None, local_time_zone=False):
     """http://www.w3.org/TR/NOTE-datetime ex: 1997-07-16T19:20:30Z