Reverted: System variables: update `broadcast_join_threshold_count` and `broadc…#6181

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ti-chi-bot merged 2 commits intopingcap:masterfrom en-jin19:System-variables-update-bcj-threshold

Aug 20, 2021

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Commits on Aug 17, 2021

System variables: update broadcast_join_threshold_count and broadcast_join_threshold_size
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Commits on Aug 18, 2021

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TomShawn
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