[lworld] RFR: Remove unused field from Method

[Frederic Parain]

Remove an unused field from the Method class, leftover of the value types thread local buffer.

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

Commit messages:
 - Remove unused field from Method

Changes: https://git.openjdk.java.net/valhalla/pull/312/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=312&range=00
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/312.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/312/head:pull/312

PR: https://git.openjdk.java.net/valhalla/pull/312