[crac] RFR: Remove stackoverflow.com reference as some tools do not like it

[Jan Kratochvil]

There exist out there some tools checking source code and they complain about this stackoverflow.com reference. It was not too important there anyway.

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Commit messages:
 - Remove stackoverflow.com reference as some tools do not like it

Changes: https://git.openjdk.org/crac/pull/150/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=150&range=00
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/crac/pull/150.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/150/head:pull/150

PR: https://git.openjdk.org/crac/pull/150