RFR: JDK-8299396: Remove metaprogramming/removeExtent.hpp [v2]

[Justin King]

On Thu, 29 Dec 2022 07:25:19 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Justin King has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Remove related test
>>   
>>   Signed-off-by: Justin King <jcking at google.com>
>
> src/hotspot/share/gc/z/zSafeDelete.hpp line 35:
> 
>> 33: class ZSafeDeleteImpl {
>> 34: private:
>> 35:   typedef typename std::remove_extent<T>::type ItemT;
> 
> `using ItemT = std::remove_extent_t<T>;`
> e.g. use the `_t` suffixed trait, and prefer type aliases.

Done.

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PR: https://git.openjdk.org/jdk/pull/11798