RFR: 8230841: Remove oopDesc::equals()

[Roman Kennke]

Hello Per,

Thanks for cleaning this up! I meant to do this eventually, but haven't
gotten to it, yet. So you beat me :-)

I looked over the webrev, and looks good to me.

I also checked Shenandoah tests (tier1+2+3) and looks good to.

Thumbs up!

Thanks,
Roman


> With the removal of Access::equals() in JDK-8230808, there's no longer
> any need to treat oop equality in a special way. Therefore, we can
> remove oopDesc::equals() and oopDesc::equals_raw().
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8230841
> Webrev: http://cr.openjdk.java.net/~pliden/8230841/webrev.0
> 
> Testing: Currently running through tier1-3 in all platforms
> 
> /Per