RFR (trivial) 8199283: Remove ValueObj class for allocation subclassing for compiler code

[coleen.phillimore at oracle.com]

There is not even very much clicking.

open webrev at http://cr.openjdk.java.net/~coleenp/8199283.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8199283

Will test with tier1 and 2 and update copyrights before commit.

Thanks,
Coleen