Remove uselesss println

[Lloyd-Pottiger]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov-commenter]

Codecov Report

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

Project coverage is 30.03%. Comparing base (9e11d0e) to head (c283e52).

:exclamation: Current head c283e52 differs from pull request most recent head 6a10af8. Consider uploading reports for the commit 6a10af8 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2383 +/- ## =========================================== - Coverage 56.07% 30.03% -26.04% =========================================== Files 329 315 -14 Lines 35040 32462 -2578 =========================================== - Hits 19646 9747 -9899 - Misses 13056 21635 +8579 + Partials 2338 1080 -1258 ``` | [Flag](https://app.codecov.io/gh/pingcap/tiup/pull/2383/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | Coverage Δ | | |---|---|---| | [cluster](https://app.codecov.io/gh/pingcap/tiup/pull/2383/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `?` | | | [dm](https://app.codecov.io/gh/pingcap/tiup/pull/2383/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `?` | | | [playground](https://app.codecov.io/gh/pingcap/tiup/pull/2383/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `15.79% <ø> (+0.01%)` | :arrow_up: | | [tiup](https://app.codecov.io/gh/pingcap/tiup/pull/2383/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `33.59% <ø> (-0.05%)` | :arrow_down: | | [unittest](https://app.codecov.io/gh/pingcap/tiup/pull/2383/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `22.23% <ø> (+<0.01%)` | :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=pingcap#carryforward-flags-in-the-pull-request-comment) to find out more.

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[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-03-13 04:01:30.576211242 +0000 UTC m=+830917.598457631: :ballot_box_with_check: agreed by breezewish.

[Lloyd-Pottiger]

/assign @kaaaaaaang

[kaaaaaaang]

/lgtm