RFR(XS): 8066864: remove ctw-test from testlibrary/

[Evgeniya Stepanova]

Hi
Please review changes for 8066864

Issue: while applying http://cr.openjdk.java.net/~iignatyev/eistepan/8025606/webrev.00/ to the repo copying was performed instead of renaming.
Fix: remove folder remained

bug: https://bugs.openjdk.java.net/browse/JDK-8066864
webrev: http://cr.openjdk.java.net/~eistepan/8066864/webrev.00/

Thank you,
Evgeniya Stepanova