RFR(xs): 8183004: Remove code related to gtest death tests from assert macro

[Thomas Stüfe]

Hi all,

may I have reviews please for this small fix.

Bug: https://bugs.openjdk.java.net/browse/JDK-8183004
cr:
http://cr.openjdk.java.net/~stuefe/webrevs/8183004--remove-code-related-to-gtest-death-tests-from-assert-macro/webrev.00/webrev/

Fix removes unnecessary coding from the assert macro, reducing its expanded
size and hence code size of debug hotspot. Details see bug report.

Thanks, Thomas