This function was created as a deprecated fallback case back in 2010 by
commit eb14120f ("pcmcia: re-work pcmcia_request_irq()") for legacy
Actual in-kernel users haven't been around for a long while. The last
in-kernel user was apparently removed four years ago by commit
5f5316fc ("am2150: Update nmclan_cs.c to use update PCMCIA API").
Just remove it entirely.
Signed-off-by: Linus Torvalds <firstname.lastname@example.org>