Context

Three validation functions in pymongo/common.py are defined but never called anywhere in the codebase (confirmed via vulture and grep):

• validate_positive_integer_or_none (line 236) — superseded by validate_non_negative_integer_or_none which is used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

These are internal functions (no public docs, no _all_), so no deprecation is needed — they can be deleted directly.

Definition of done

Unused functions deleted.

Pitfalls

N/A