drivers: saic: remove stubbed functions

With the commit b2d6db2 ("core: interrupt: helper function for
raise_pi, raise_sgi, set_affinity") the struct itr_ops .raise_pi,
.raise_sgi, and .set_affinity are now optional so remove the stubbed
functions.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

core/drivers/atmel_saic.c

@@ -130,32 +130,12 @@ static void saic_disable(struct itr_chip *chip __unused, size_t it)
 	saic_write_reg(AT91_AIC_IDCR, 1);
 }
 
-static void saic_raise_pi(struct itr_chip *chip __unused, size_t it __unused)
-{
-	panic();
-}
-
-static void saic_raise_sgi(struct itr_chip *chip __unused, size_t it __unused,
-			   uint8_t cpu_mask __unused)
-{
-	panic();
-}
-
-static void saic_set_affinity(struct itr_chip *chip __unused,
-			      size_t it __unused, uint8_t cpu_mask __unused)
-{
-	panic();
-}
-
 static const struct itr_ops saic_ops = {
 	.add = saic_add,
 	.mask = saic_disable,
 	.unmask = saic_enable,
 	.enable = saic_enable,
 	.disable = saic_disable,
-	.raise_pi = saic_raise_pi,
-	.raise_sgi = saic_raise_sgi,
-	.set_affinity = saic_set_affinity,
 };
 
 static int saic_dt_get_irq(const uint32_t *properties, int len,