hg: jdk9/sandbox/jdk: JDK-8178037: additionally remove unused overview files.

[magnus.ihse.bursie at oracle.com]

Changeset: 5526e8545dce
Author:    ihse
Date:      2017-04-07 13:13 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/5526e8545dce

JDK-8178037: additionally remove unused overview files.

- src/java.management/share/classes/mgmt-overview.html
- src/java.security.jgss/share/classes/jgss-overview.html
- src/jdk.security.auth/share/classes/jaas-overview.html