Remove HISTORY duplicated heading
## Bug fixes
* Fix concurrent use of `Array.multi_index` and `.df` by using new instance for each invocation [#672](https://github.com/TileDB-Inc/TileDB-Py/pull/672)
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-## Bug Fixes
* For attributes, if `var=False` but the bytestring is fixed-width or if `var=True` but the bytestring is variable length, error out [#663](https://github.com/TileDB-Inc/TileDB-Py/pull/663)
# TileDB-Py 0.10.0 Release Notes
