scsi: gvp11: Remove unused gvp11_setup() function

scsi: gvp11: Remove unused gvp11_setup() function

This function has no declaration, which causes a warning:

drivers/scsi/gvp11.c:53:6: error: no previous prototype for 'gvp11_setup' [-Werror=missing-prototypes]

Since there is also no caller, just remove the function.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20230810141947.1236730-12-arnd@kernel.org
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com> # RISC-V
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>