Remove use_async argument in dataset.to_table call

[js8544]

The use_async parameter has been removed in https://github.com/apache/arrow/pull/34034

[coveralls]

Pull Request Test Coverage Report for Build 4136805793

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 87.222%

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Totals
Change from base Build 3833853340:	0.0%
Covered Lines:	1488
Relevant Lines:	1706

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💛 - Coveralls

[alistaire47]

Thank you!