Address review feedback

Author: aclark4life

doc/changelog.rst

@@ -8,12 +8,10 @@ PyMongo 4.17 brings a number of changes including:
 
 - Remove unused validation functions from pymongo/common.py
 
-  - validate_positive_integer_or_none (line 236) — superseded by
-    validate_non_negative_integer_or_none which is used
-  - validate_int_or_basestring (line 264) — a variant of
-    validate_non_negative_int_or_basestring which is used
-  - validate_auth_option (line 823) — validates auth mechanism properties but
-    is never invoked
+  - ``validate_positive_integer_or_none`` (internal helper, no longer used)
+  - ``validate_int_or_basestring`` (internal helper, no longer used)
+  - ``validate_auth_option`` (validated auth mechanism properties but was never
+    used)
 
 - Added the :meth:`~pymongo.asynchronous.client_session.AsyncClientSession.bind` and :meth:`~pymongo.client_session.ClientSession.bind` methods
   that allow users to bind a session to all database operations within the scope of a context manager instead of having to explicitly pass the session to each individual operation.

pymongo/common.py

@@ -796,8 +796,6 @@ def validate_server_monitoring_mode(option: str, value: str) -> str:
     "waitqueuetimeoutms",
 ]
 
-_AUTH_OPTIONS = frozenset(["authmechanismproperties"])
-
 
 def _get_validator(
     key: str, validators: dict[str, Callable[[Any, Any], Any]], normed_key: Optional[str] = None