RFR (trivial): 8231560: Remove expired flags in JDK 16

[Erik Österlund]

Hi David,

Ah yes. This makes me happy. Looks fantastic!

Thanks,
/Erik

> On 12 Jun 2020, at 07:11, David Holmes <david.holmes at oracle.com> wrote:
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8231560
> webrev: http://cr.openjdk.java.net/~dholmes/8231560/webrev/
> 
> It is that time of the release again. :)
> 
> All expired flags are now removed from the flag table.
> 
> Testing:
>  - local build
>  - full repo grep for the expired flag names
>  - checked all flags now reported as unknown
> 
> Thanks,
> David
> -----
> 
> -   { "BindGCTaskThreadsToCPUs",       JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
> -   { "UseGCTaskAffinity",             JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
> -   { "GCTaskTimeStampEntries",        JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
> -   { "G1RSetScanBlockSize",           JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> -   { "UseParallelOldGC",              JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> -   { "CompactFields",                 JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> -   { "FieldsAllocationStyle",         JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> - #ifndef X86
> -   { "UseSSE",                        JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> - #endif // !X86
> -   { "UseAdaptiveGCBoundary",         JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> -   { "MonitorBound",                  JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> - #ifdef AARCH64
> -   { "UseBarriersForVolatile",        JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> - #endif
> -   { "UseLWPSynchronization",         JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> -   { "BranchOnRegister",              JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },
> -   { "LIRFillDelaySlots",             JDK_Version::undefined(), JDK_Version::jdk(15), JDK_Version::jdk(16) },