fix: remove unnecessary imports from tests

[neznaika0]

Description
Optimized the list of IDs for whereIn(). Before that, the IDs were repeated: [1, 2, 1, 3, 1].
Although SQL optimizes this on its own, it looks better on the PHP side.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[michalsn]

Thank you.