net: sfp: remove old sfp_parse_* functions

Remove the old sfp_parse_*() functions that are now no longer used.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1uydVz-000000061Wj-13Yd@rmk-PC.armlinux.org.uk


Signed-off-by: Jakub Kicinski <kuba@kernel.org>