Remove outdated comment

This is no longer proprietary code, it was open sourced as
Apache-2.0 in a06f72bd54f92c6da88a7d04906d9feb24e8644f

(cherry picked from commit 40c06452497b252f8f3ba116b5ae628e8b5417e4)
Merge pull request #3 from dirkmueller/release/stoney/master

Remove outdated comment