Merge commit 'd892859' into 3.0.x

* commit 'd892859':
  (#16791) Remove tests for unused behavior
  (#16791) Re-instate deprecated symbolize and symbolizehash!
  Eliminate `symbolize` everywhere, and remove it.
  (#16791) Revert "Merge branch 'feature/2.7.x/json-terminus-backport' of https://github.com/daniel-pittman/puppet into 2.7.x"
  (#16791) Revert "Maint: Fix intermittently failing spec test"
  (#16791) Revert "Merge branch 'perf/2.7.x/backport-activesupport-hook-disabling' of https://github.com/daniel-pittman/puppet into 2.7.x"