RFR: 8375139: [lworld] Disable jcheck in "type-classes" branch

[David Simms]

Relax

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Commit messages:
 - Whoops
 - 8375139: [lworld] Disable jcheck in "type-classes" branch

Changes: https://git.openjdk.org/valhalla/pull/1895/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1895&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8375139
  Stats: 8 lines in 1 file changed: 2 ins; 3 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1895.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1895/head:pull/1895

PR: https://git.openjdk.org/valhalla/pull/1895