None uses X11 directly, this is only needed in the Library itself.
Also this was even added on all platforms while many don't even have X11.
Thanks @Isomorphix noticing something off about that once (a long time ago...): https://irrlicht.sourceforge.io/forum/viewtopic.php?f=1&t=49033
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6294 dfc29bdd-3216-0410-991c-e03cc46cb475
