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

[Jie Fu]

On Wed, 19 May 2021 07:42:22 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> Looks good and trivial.

Thanks @TobiHartmann .

-------------

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