[13] RFR: JDK-8222746: Cleanup third-party legal files

[Kevin Rushforth]

Phil,

Please review the following cleanup patch for the .md legal files:

https://bugs.openjdk.java.net/browse/JDK-8222746
http://cr.openjdk.java.net/~kcr/8222746/webrev.00/

-- Kevin