[riscv-port-jdk11u:riscv-port] RFR: 8328580: Remove trivial shared code changes which are leftover from riscv port

[Gui Cao]

Hi, This patch used to remove trivial shared code changes which are leftover from riscv port, here are some related discussions https://github.com/openjdk/riscv-port-jdk11u/pull/11#issuecomment-2008999955. just a few changes to copyright date and spurious space.

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Commit messages:
 - 8328580: Remove trivial shared code changes which are leftover from riscv port

Changes: https://git.openjdk.org/riscv-port-jdk11u/pull/12/files
  Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk11u&pr=12&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328580
  Stats: 3 lines in 3 files changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/riscv-port-jdk11u/pull/12.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk11u.git pull/12/head:pull/12

PR: https://git.openjdk.org/riscv-port-jdk11u/pull/12