package/binutils: remove version 2.34

Now that we have 2.35, 2.36 and 2.37, with 2.36 as the default, we can
remove 2.34.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>