chore: drop ignoreUnchecked for deprecated members

[vvcephei]

Follow up to https://github.com/confluentinc/ksql/pull/7363 .

Once we feel all builds will see the upstream changes, we no longer need to use ignoreUnchecked for the dropped close methods.

[ghost]

@confluentinc It looks like @vvcephei just signed our Contributor License Agreement. :+1:

Always at your service,

clabot

[cla-assistant[bot]]

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