RFR: 8268902: Testing for threadObj != NULL is unnecessary in suspend handshake

[Daniel D.Daugherty]

On Fri, 25 Jun 2021 17:50:46 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> In the last pull request on this topic, I was making more general (mis)statements, but this null threadObj check is only for the case where we're suspending a thread which already has a threadObj.  This null check is unnecessary.
> Tested already with tier1-6 (rerun tier1).

Thumbs up.

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Marked as reviewed by dcubed (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4598