RFR: 8371680: JVMTI: Remove unused VMOp type JvmtiPostObjectFree

[Leonid Mesnik]

On Wed, 12 Nov 2025 07:39:29 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> The VMOp type `JvmtiPostObjectFree` was introduced with [JDK-8212879](https://bugs.openjdk.org/browse/JDK-8212879) but was never used for any `VM_Operation`. The `VM_Operation` introduced in that patch `VM_JvmtiPostObjectFree` used the `Cleanup` VMOp type instead.
> 
> `VM_JvmtiPostObjectFree` was later removed completely with [JDK-8256811](https://bugs.openjdk.org/browse/JDK-8256811). So there is no need for this VMOp type.
> 
> I suggest a trivial removal of this unused symbol.
> 
> * Testing
>   * GHA

Marked as reviewed by lmesnik (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28254#pullrequestreview-3454260122