LPS-30436 Removed unnecessary underline

Backport of this commit :
https://github.com/liferay/liferay-portal/commit/99830e86dd602c70e97882af299106add6ed2877

I try to backport all modifications since the release of 6.1.1-ce-ga2 but i didn't succeed so i just backport this commit.

Laurent CHARLOIS
Intellinium.com