remove allow-untyped-defs from _export/db/logging.py (pytorch#144093)

Pull Request resolved: pytorch#144093
Approved by: https://github.com/Skylion007

Author: bobrenjc93

torch/_export/db/logging.py

@@ -1,7 +1,6 @@
-# mypy: allow-untyped-defs
+from typing import Optional
 
-
-def exportdb_error_message(case_name: str):
+def exportdb_error_message(case_name: str) -> str:
     from .examples import all_examples
     from torch._utils_internal import log_export_usage
 
@@ -19,7 +18,7 @@ def exportdb_error_message(case_name: str):
         return f"{case_name} is unsupported."
 
 
-def get_class_if_classified_error(e):
+def get_class_if_classified_error(e: Exception) -> Optional[str]:
     """
     Returns a string case name if the export error e is classified.
     Returns None otherwise.