RFR(S): 8209856: Obsolete error reporter

[Mikael Vidstedt]

Please review this change which removes the (stub, not-implemented) error reporter from hotspot, and obsoletes two flags which were meant to control its behavior:

Bug: https://bugs.openjdk.java.net/browse/JDK-8209856 <https://bugs.openjdk.java.net/browse/JDK-8209856>
CSR: https://bugs.openjdk.java.net/browse/JDK-8209857 <https://bugs.openjdk.java.net/browse/JDK-8209857>
Webrev: http://cr.openjdk.java.net/~mikael/webrevs/8209856/webrev.00/open/webrev/ <http://cr.openjdk.java.net/~mikael/webrevs/8209856/webrev.00/open/webrev/>

Cheers,
Mikael