RFR: 2630: Remove graal-dev list

[Doug Simon]

This removes graal-dev as a watcher of various openjdk directories.

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Commit messages:
 - remove graal mailing list matchers

Changes: https://git.openjdk.org/skara/pull/1745/files
  Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1745&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-2630
  Stats: 8 lines in 1 file changed: 0 ins; 8 del; 0 mod
  Patch: https://git.openjdk.org/skara/pull/1745.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1745/head:pull/1745

PR: https://git.openjdk.org/skara/pull/1745