Remove the landscape rtl version of navigation_bar.xml

This will fix the crash when switching to hebrew.

We don't need to have this file as the navbar is fully customizable.

Change-Id: Iec5ad3a0768967b5e673a705a5680798c328e3a8
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>