Play Framework

chore: remove framework/patches/ — all entries are stranded

None of these patches are referenced by the build, and every target
they patched has either been removed from the project or upgraded past
the patch's applicability:

- javaflow-r1590792-*.patch (4 files): Javaflow/Continuations were
  fully removed (commons-javaflow dropped from deps, ContinuationEnhancer
  retired, invokeWithContinuation gone). The custom javaflow jar these
  patches built no longer exists in the build.
- hibernate-6.6.31-patch-play.patch + README: superseded by the
  Hibernate 6.6.31 -> 7.2.0 upgrade. Won't apply to 7.x sources.
- hibernate-7.2.0-patch-play.README: orphan — README documents how to
  apply a 7.2.0 patch file that was never authored. The optimization it
  describes (willBeSaved cascade short-circuit) is not currently active
  and Play functions correctly without it.
- oval-4.0.0_from_3.2.1.patch + README: the 3.2.1 -> 4.0.0 upgrade is
  done (oval-4.0.0.jar ships in framework/lib/, dependencies.yml pins
  oval 4.0.0). Patch is the upgrade path itself, no longer needed.
- unsigned-eclipse.jdt.xml: targets eclipse.jdt.core 3.8.0; project
  shipped 3.44.0 long ago.

Recoverable from git history if any are needed in the future.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>