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

[Jie Fu]

Hi all,

Please review the trivial change which removes the useless mask.incr.

Thanks.
Best regards,
Jie

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

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

Changes: https://git.openjdk.java.net/jdk/pull/4107/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4107&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8267364
  Stats: 43 lines in 1 file changed: 0 ins; 43 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4107.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4107/head:pull/4107

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