RFR: JDK-8325529: Remove unused imports from `ModuleGenerator` test file

[Pavel Rappo]

On Thu, 8 Feb 2024 23:51:46 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> Please review an automated update to fix the imports in the test `sampleapi` package.
> 
> While only one file was affected in a sibling PR, it seems that all the files in the package had disorganized imports.  While low priority, fixing them here will stop the issue showing up in other PRs.

Marked as reviewed by prappo (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17782#pullrequestreview-1875589106