RFR: 8355962: RISCV64 cross build fails after 8354996

[Chen Liang]

Roll back the HelloClasslist downcall generation that caused cross build failures for riscv64 and aarch64 from x86-64.

Testing: riscv64 cross build

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Commit messages:
 - 8355962: RISCV64 cross build fails after 8354996

Changes: https://git.openjdk.org/jdk/pull/25013/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25013&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355962
  Stats: 7 lines in 2 files changed: 0 ins; 6 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25013.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25013/head:pull/25013

PR: https://git.openjdk.org/jdk/pull/25013