Hi, when working with jdk.zipfs, I found some opportunity for cleanups. I'd like to contribute this independently from my other thread regarding Posix permissions in zip files (http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-November/056426.html). So, please help to review the cleanup.
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8215472.0/ Bug: https://bugs.openjdk.java.net/browse/JDK-8215472 Thanks Christoph
