RFR: 8352709: Remove bad timing annotations from WhileOpTest.java

[Leo Korinth]

WhileOpTest.java is a TestNG test (`TestNG.dirs` is set in Find file: `test/jdk/java/util/stream/test/TEST.properties`)

As such, the `@run main/timeout=240` annotation is ignored. If that was not the case, it would complain about not specifying a main class.

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Commit messages:
 - 8352709: Remove bad timing annotations from WhileOpTest.java

Changes: https://git.openjdk.org/jdk/pull/24193/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24193&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352709
  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24193.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24193/head:pull/24193

PR: https://git.openjdk.org/jdk/pull/24193