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

[coleen.phillimore at oracle.com]

Thanks Aleksey.
Coleen

On 10/22/18 1:56 PM, Aleksey Shipilev wrote:
> On 10/22/2018 07:53 PM, coleen.phillimore at oracle.com wrote:
>> open webrev at http://cr.openjdk.java.net/~coleenp/8212774.01/webrev
> Looks good to me.
>
> -Aleksey
>