RFR (JAXP): 8012683 : Some ObjectFactory classes should be removed.

[huizhe wang]

Hi,

This is a quick fix to remove a copy of obsolete ObjectFactory classes. 
They should have been removed in a previous consolidation work (7053556) 
but were mistakenly kept in the repo.

http://cr.openjdk.java.net/~joehw/jdk8/8012683/webrev/

Thanks,
Joe