[8] RFR: Revert leftover changes in type.{cpp|hpp}

[Roman Kennke]

Yes, that looks good.

How's that working in later versions?

Roman

> https://cr.openjdk.java.net/~shade/shenandoah/8u-type-revert/webrev.01/
> 
> Comparing to upstream, there is an awkward change in Type::make_oopptr. If we remove it, tests start
> to assert in need_barrier_impl. I prefer to work that around in Shenandoah code, rather than let it
> leak into the shared one.
> 
> Testing: hotspot_gc_shenandoah {fastdebug,release}
>