Remove unused import

[jcsp]

Problem

Linter error from a merge collision

Summary of changes

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[github-actions]

2820 tests run: 2699 passed, 0 failed, 121 skipped (full report)

---

Flaky tests (1)

Postgres 14

• test_pageserver_init_node_id: debug

Code coverage* (full report)

• functions: 28.1% (6494 of 23083 functions)
• lines: 46.9% (46095 of 98280 lines)

* collected from Rust tests only

---

_{The comment gets automatically updated with the latest test results
05887b7 at 2024-04-26T11:23:05.085Z :recycle:}