hg: jdk/sandbox: Code clean up for unsupported DTLS 1.3

[xuelei.fan at oracle.com]

Changeset: 2d7e08d730b6
Author:    xuelei
Date:      2018-06-09 08:08 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/2d7e08d730b6

Code clean up for unsupported DTLS 1.3

! src/java.base/share/classes/sun/security/ssl/CipherSuite.java
! src/java.base/share/classes/sun/security/ssl/Finished.java
! src/java.base/share/classes/sun/security/ssl/ProtocolVersion.java
! src/java.base/share/classes/sun/security/ssl/SSLMasterKeyDerivation.java
! src/java.base/share/classes/sun/security/ssl/SSLServerSocketFactoryImpl.java
! src/java.base/share/classes/sun/security/ssl/SSLTrafficKeyDerivation.java