RFR 8210470: Remove unused Verifier::verify() Verifier::Mode argument

[Harold David Seigel]

Hi,

Please review this change to remove the unused "Verifier::Mode mode" 
argument from function Verifier::verify().

Open Webrev: 
http://cr.openjdk.java.net/~hseigel/bug_8210470/webrev/index.html

JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8210470

This fix was regression tested by running Mach5 tiers 1 and 2 tests and 
builds on Linux-x64, Windows, and Mac OS X, running tiers 3-5 tests on 
Linux-x64, and by running JCK-11 Lang and VM tests on Linux-x64.

Thanks, Harold