mmc: slot-gpio: Remove unused mmc_gpio_set_cd_isr

mmc_gpio_set_cd_isr() last use was removed in 2018 by
commit 7838a8d ("mmc: omap_hsmmc: Kill off cover detection")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://lore.kernel.org/r/20250129214335.125292-1-linux@treblig.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/slot-gpio.c

@@ -159,18 +159,6 @@ int mmc_gpio_set_cd_wake(struct mmc_host *host, bool on)
 }
 EXPORT_SYMBOL(mmc_gpio_set_cd_wake);
 
-/* Register an alternate interrupt service routine for
- * the card-detect GPIO.
- */
-void mmc_gpio_set_cd_isr(struct mmc_host *host, irq_handler_t isr)
-{
-	struct mmc_gpio *ctx = host->slot.handler_priv;
-
-	WARN_ON(ctx->cd_gpio_isr);
-	ctx->cd_gpio_isr = isr;
-}
-EXPORT_SYMBOL(mmc_gpio_set_cd_isr);
-
 /**
  * mmc_gpiod_request_cd - request a gpio descriptor for card-detection
  * @host: mmc host

include/linux/mmc/slot-gpio.h

@@ -22,7 +22,6 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
 int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
 			 unsigned int idx, unsigned int debounce);
 int mmc_gpiod_set_cd_config(struct mmc_host *host, unsigned long config);
-void mmc_gpio_set_cd_isr(struct mmc_host *host, irq_handler_t isr);
 int mmc_gpio_set_cd_wake(struct mmc_host *host, bool on);
 void mmc_gpiod_request_cd_irq(struct mmc_host *host);
 bool mmc_can_gpio_cd(struct mmc_host *host);