binutils: remove version 2.22

We already use 2.24 as the default, 2.25 has been around for some
time, and 2.22 is clearly very old, so let's get rid of it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>