chore: fix mypy failure (#1500)

# Description
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- closes #106
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python/deltalake/writer.py

@@ -220,7 +220,7 @@ def visitor(written_file: Any) -> None:
         if PYARROW_MAJOR_VERSION >= 9:
             size = written_file.size
         else:
-            size = filesystem.get_file_info([path])[0].size  # type: ignore
+            size = filesystem.get_file_info([path])[0].size
 
         add_actions.append(
             AddAction(