Revert "Adding support for DLQ for ZetaSQL (#25426)"

[kennknowles]

The reverted change causes incorrect results in error cases in the ZetaSQL compliance tests.

This reverts commit 299be58.

The reverted change caused failure in ZetaSQL compliance testing, specifically for error cases.

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[kennknowles]

@pabloem @apilloud

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[apilloud]

LGTM

[kennknowles]

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