RFR: 8043666: Remove unused files from jaxp repository

[huizhe wang]

Removing unused files in jaxp repository. Most of them are 
META-INF/services files used by Apache build process.  The COPYING files 
at the bottom came with SAX, but they are included in the 
THIRD_PARTY_README file already. Please review.

http://cr.openjdk.java.net/~joehw/jdk9/8043666/webrev/
Thanks,
Joe