revert a comment

[lizhuqi]

What this PR does / why we need it:
Accidentally commented a line in previous PR. This PR is just to revert the comment.

Special notes for your reviewer:

Release note:

none

[k8s-ci-robot]

Hi @lizhuqi. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[coveralls]

Pull Request Test Coverage Report for Build 904359386

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.805%

---

Totals
Change from base Build 902364184:	0.0%
Covered Lines:	796
Relevant Lines:	917

---

💛 - Coveralls

[andyzhangx]

/ok-to-test
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, lizhuqi

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Needs approval from an approver in each of these files:

• OWNERS [andyzhangx]

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