[lworld] RFR: 8334291: [lworld] Remove old "combo" package (from MVT testing bytecode API)

[David Simms]

Remove old unsed package

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

Commit messages:
 - 8334291: [lworld] Remove old "combo" package (from MVT testing bytecode API)

Changes: https://git.openjdk.org/valhalla/pull/1129/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1129&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334291
  Stats: 1471 lines in 5 files changed: 0 ins; 1471 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1129.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1129/head:pull/1129

PR: https://git.openjdk.org/valhalla/pull/1129