RFR 8178912, Throw away sample tests

[Felix Yang]

Hi there,

    please review following change to remove tests for several samples, 
which have been removed in "JEP 298: Remove Demos and Samples".

Webrev: http://cr.openjdk.java.net/~xiaofeya/8178912/webrev.00/

Bug: https://bugs.openjdk.java.net/browse/JDK-8178912

Corresponding JEP: https://bugs.openjdk.java.net/browse/JDK-8164813

Thanks,

Felix