RFR (S): 8077411: Remove CollectedHeap::supports_heap_inspection()

[Bengt Rutisson]

Hi everyone,

Could I have a couple of reviews for this small change?

https://bugs.openjdk.java.net/browse/JDK-8077411
http://cr.openjdk.java.net/~brutisso/8077411/webrev.00/

All implementation of CollectedHeap::supports_heap_inspection() are the 
same and all they do is return true. The only usage is to check whether 
we can initiate a VM_GC_HeapInspection operation. So, by removing the 
check in VM_GC_HeapInspection (since it anyway always return true) we 
don't need CollectedHeap::supports_heap_inspection() anymore.

Thanks,
Bengt