[jdk17u-dev] RFR: 8299479: Remove metaprogramming/decay.hpp [v3]

[George Adams]

> prerequisite to bumping googletest to 1.13.0
> 
> Applies cleanly other than the deleted file (`src/hotspot/share/metaprogramming/decay.hpp`) containing some extra commits

George Adams has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/master' into decay
 - Backport 10a747c70bb957b7dd268009e6062771085b97eb
 - Backport ce6395a1356a3d1334aeffc70ac8e4f86dd81a4c

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2675/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2675/files/c155b8c2..ba61d072

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2675&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2675&range=01-02

  Stats: 277 lines in 9 files changed: 5 ins; 268 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2675.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2675/head:pull/2675

PR: https://git.openjdk.org/jdk17u-dev/pull/2675