gpio: TODO: remove task duplication

The removal of linux/gpio.h is already tracked by the item about
converting drivers to using the descriptor-based API. Remove the
duplicate.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250321-gpio-todo-updates-v1-2-7b38f07110ee@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

drivers/gpio/TODO

@@ -86,15 +86,6 @@ Work items:
   CONFIG_OF_GPIO_MM_GPIOCHIP from the kernel.
 
 
-Get rid of <linux/gpio.h>
-
-This legacy header is a one stop shop for anything GPIO is closely tied
-to the global GPIO numberspace. The endgame of the above refactorings will
-be the removal of <linux/gpio.h> and from that point only the specialized
-headers under <linux/gpio/*.h> will be used. This requires all the above to
-be completed and is expected to take a long time.
-
-
 Collect drivers
 
 Collect GPIO drivers from arch/* and other places that should be placed