fix minor code unreachability error

[Abirdcfly]

Signed-off-by: Abirdcfly fp544037857@gmail.com

Description

Related Issue(s)

Fixes #10772

Checklist

• "Backport me!" label has been added if this change should be backported
• Tests were added or are not required
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

Review Checklist

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Bug fixes

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Non-trivial changes

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New/Existing features

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Backward compatibility

• Protobuf changes should be wire-compatible.
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• vtctl command output order should be stable and awk-able.

[Abirdcfly]

This commit should be able to backport to an older version, but I'm not sure if it's necessary.

[deepthi]

Looks like all feedback has been addressed.
Thank you for the contribution!