RFR: 8364750: Remove unused declaration in jvm.cpp

[Coleen Phillimore]

Please review this trivial change to remove the declaration of the native JVM function that I removed in [JDK-8364187](https://bugs.openjdk.org/browse/JDK-8364187).
Tested with tier1 on Oracle supported platforms as sanity test (in progress).

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Commit messages:
 - 8364750: Remove unused declaration in jvm.cpp

Changes: https://git.openjdk.org/jdk/pull/26732/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26732&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364750
  Stats: 10 lines in 1 file changed: 0 ins; 10 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26732.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26732/head:pull/26732

PR: https://git.openjdk.org/jdk/pull/26732