RFR: 8267364: Remove mask.incr which is introduced by JDK-8256973

[Jie Fu]

On Wed, 19 May 2021 07:42:08 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Looks good and trivial.

Thanks @iwanowww .

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PR: https://git.openjdk.java.net/jdk/pull/4107