remove mypy ignore

Author: chinmay-bhat

pyiceberg/table/__init__.py

@@ -1317,7 +1317,7 @@ def snapshot_as_of_timestamp(self, timestamp_ms: int, inclusive: bool = True) ->
 
     def current_ancestors(self) -> Iterable[Snapshot]:
         """Get a list of ancestors of and including the current snapshot."""
-        return ancestors_of(self.current_snapshot(), self.metadata)  # type: ignore
+        return ancestors_of(self.current_snapshot(), self.metadata)
 
     def history(self) -> List[SnapshotLogEntry]:
         """Get the snapshot history of this table."""

pyiceberg/table/snapshots.py

@@ -419,7 +419,7 @@ def set_when_positive(properties: Dict[str, str], num: int, property_name: str)
         properties[property_name] = str(num)
 
 
-def ancestors_of(current_snapshot: Snapshot, table_metadata: TableMetadata) -> Iterable[Snapshot]:
+def ancestors_of(current_snapshot: Optional[Snapshot], table_metadata: TableMetadata) -> Iterable[Snapshot]:
     """Get the ancestors of and including the given snapshot."""
     if current_snapshot:
         yield current_snapshot