hg: jdk/sandbox: Various nits and dead code removal

[anthony.scarpino at oracle.com]

Changeset: 001e4e7c0a01
Author:    ascarpino
Date:      2018-06-14 11:59 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/001e4e7c0a01

Various nits and dead code removal

! src/java.base/share/classes/sun/security/ssl/CertificateMessage.java
! src/java.base/share/classes/sun/security/ssl/DTLSRecord.java
! src/java.base/share/classes/sun/security/ssl/Finished.java
! src/java.base/share/classes/sun/security/ssl/SSLEngineOutputRecord.java
! src/java.base/share/classes/sun/security/ssl/SSLRecord.java
! src/java.base/share/classes/sun/security/ssl/ServerHelloDone.java
! src/java.base/share/classes/sun/security/ssl/SupportedVersionsExtension.java