chore: unused import

[cjc7373]

After #8378 and #8400 merged concurrently, there has been an unused import that breaks the build.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 61.38%. Comparing base (67a0f6f) to head (36822e4). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #8413 +/- ## ========================================== + Coverage 61.01% 61.38% +0.36% ========================================== Files 351 351 Lines 41801 41739 -62 ========================================== + Hits 25505 25620 +115 + Misses 13980 13813 -167 + Partials 2316 2306 -10 ``` | [Flag](https://app.codecov.io/gh/apecloud/kubeblocks/pull/8413/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/apecloud/kubeblocks/pull/8413/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud) | `61.38% <ø> (+0.36%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud#carryforward-flags-in-the-pull-request-comment) to find out more.

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[zjx20]

/approve