Eleven: remove junit dependency

We are just pulling in junit for an runtime assertion call
within a method, which is even unused.

Remove junit call and dependency but leave the unused method there
which will be rm -rf'ed in followup changes.

Change-Id: Ib71ac78f3e0bbabcb5b4acdaa34e853e39b616aa
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>