gpio: remove dev-sync-probe

There are no more users. Remove the dev-sync-probe module.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260327-gpio-kill-dev-sync-probe-v1-4-efac254f1a1d@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: Bartosz Golaszewski

drivers/gpio/Kconfig

@@ -2108,6 +2108,3 @@ config GPIO_VIRTUSER
 endmenu
 
 endif
-
-config DEV_SYNC_PROBE
-	tristate

drivers/gpio/Makefile

@@ -21,9 +21,6 @@ obj-$(CONFIG_GPIO_GENERIC)	+= gpio-generic.o
 # directly supported by gpio-generic
 gpio-generic-$(CONFIG_GPIO_GENERIC)	+= gpio-mmio.o
 
-# Utilities for drivers that need synchronous fake device creation
-obj-$(CONFIG_DEV_SYNC_PROBE)		+= dev-sync-probe.o
-
 obj-$(CONFIG_GPIO_104_DIO_48E)		+= gpio-104-dio-48e.o
 obj-$(CONFIG_GPIO_104_IDI_48)		+= gpio-104-idi-48.o
 obj-$(CONFIG_GPIO_104_IDIO_16)		+= gpio-104-idio-16.o