IB/hfi1: Remove unused hfi1_format_hwerrors

hfi1_format_hwerrors() was added in 2015 by
commit 77241056 ("IB/hfi1: add driver files")
but never used.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://patch.msgid.link/20241216211914.745111-1-linux@treblig.org


Signed-off-by: Leon Romanovsky <leon@kernel.org>