greybus: gpio: Drop get_version support

This is done from a common place now, no need to replicate it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/gpio.c

@@ -33,8 +33,6 @@ struct gb_gpio_line {
 
 struct gb_gpio_controller {
 	struct gb_connection	*connection;
-	u8			version_major;
-	u8			version_minor;
 	u8			line_max;	/* max line number */
 	struct gb_gpio_line	*lines;
 
@@ -51,9 +49,6 @@ struct gb_gpio_controller {
 	container_of(chip, struct gb_gpio_controller, chip)
 #define irq_data_to_gpio_chip(d) (d->domain->host_data)
 
-/* Define get_version() routine */
-define_get_version(gb_gpio_controller, GPIO);
-
 static int gb_gpio_line_count_operation(struct gb_gpio_controller *ggc)
 {
 	struct gb_gpio_line_count_response response;
@@ -476,11 +471,6 @@ static int gb_gpio_controller_setup(struct gb_gpio_controller *ggc)
 {
 	int ret;
 
-	/* First thing we need to do is check the version */
-	ret = get_version(ggc);
-	if (ret)
-		return ret;
-
 	/* Now find out how many lines there are */
 	ret = gb_gpio_line_count_operation(ggc);
 	if (ret)