RFR (T) 8251489: universe.cpp includes too many headers

[Lois Foltan]

Looks good & trivial.
Lois

On 8/12/2020 11:28 AM, Coleen Phillimore wrote:
> See bug for description. Tested with tier1 on 4 platforms, built with 
> --no-precompiled-headers.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/2020/8251489.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8251489
>
> Thanks,
> Coleen
>