RFR (trivial) 8212774: Remove dead code touching Klass::_lower_dimension

[David Holmes]

LGTM.

Thanks,
David

On 23/10/2018 3:53 AM, coleen.phillimore at oracle.com wrote:
> Summary: Found dead code removal while looking at usage of Compile_lock. 
> This dead code doesn't have Compile_lock but other code touching 
> Klass::_{upper,lower}_dimension do.
> 
> Ran mach5 tier1.
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/8212774.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8212774
> 
> Thanks,
> Coleen