[jdk21u-dev] RFR: 8325529: Remove unused imports from `ModuleGenerator` test file [v2]

[Goetz Lindenmaier]

> I backport this for parity with 21.0.7-oracle

Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:

  Fix build

-------------

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/1306/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/1306/files/6f6c0399..dd5b001e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1306&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1306&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1306.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1306/head:pull/1306

PR: https://git.openjdk.org/jdk21u-dev/pull/1306