RFR: 8287150: Remove HeapRegion::block_start_const declaration without definition

[Thomas Schatzl]

On Mon, 23 May 2022 09:40:04 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Hi,
>> 
>>   please review this trivial change to remove an unused declaration without definition.
>> 
>> Testing: local compilation
>> 
>> Thanks,
>>   Thomas
>
> Good and trivial.

Thanks @albertnetymk for your review.

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PR: https://git.openjdk.java.net/jdk/pull/8834