RFR(T) : 8219565: [deadcode] remove share/utilities/intHisto.*

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev/8219565/webrev.00/
> 143 lines changed: 0 ins; 143 del; 0 mod; 

Hi all,

could you please review this trivial clean up? recent code coverage analysis showed that "IntHistogram class doesn't seem to be used anywhere in hotspot, and can/should be removed."  the patch is just 'hg rm src/hotspot/share/utilities/intHisto.*' + removing unneeded include in g1RemSet.cpp.

webrev: http://cr.openjdk.java.net/~iignatyev/8219565/webrev.00/
JBS: https://bugs.openjdk.java.net/browse/JDK-8219565
testing: tier[1-2]

Thanks,
-- Igor