Removed useless :lang option.

PR: #2104
https://github.com/opf/openproject/commit/48f721200b6876d20d406589e9f3ed9a2887a61e

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%407901
Removed useless :lang option.

PR: #2104
https://github.com/opf/openproject/commit/48f721200b6876d20d406589e9f3ed9a2887a61e

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%407902