RFR: 8352618: Remove old deprecated functionality in the build system

Fri Mar 21 15:40:26 UTC 2025

It's time for some spring cleaning in the build system. These checks are for functionality that has long been deprecated, and should not be in use anymore. We should remove it to keep the code base simpler.

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Commit messages:
 - 8352618: Remove old deprecated functionality in the build system

Changes: https://git.openjdk.org/jdk/pull/24159/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24159&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8352618
  Stats: 64 lines in 10 files changed: 0 ins; 57 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/24159.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24159/head:pull/24159

PR: https://git.openjdk.org/jdk/pull/24159