RFR (T) 8245428: Remove unused oopFactory functions

[coleen.phillimore at oracle.com]

I happened to notice that functions are unused.  Tier1 tested.

open webrev at http://cr.openjdk.java.net/~coleenp/2020/8245428.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8245428

Thanks,
Coleen