There is no usages for this field. As it has the same value as `DAY_OF_MONTH_MASK` we can drop it.
------------- Commit messages: - [PATCH] Drop unused field java.util.Calendar.DATE_MASK Changes: https://git.openjdk.org/jdk/pull/10888/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10888&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8296140 Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/10888.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10888/head:pull/10888 PR: https://git.openjdk.org/jdk/pull/10888
