greybus: pwm: 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/pwm.c

@@ -16,8 +16,6 @@
 
 struct gb_pwm_chip {
 	struct gb_connection	*connection;
-	u8			version_major;
-	u8			version_minor;
 	u8			pwm_max;	/* max pwm number */
 
 	struct pwm_chip		chip;
@@ -27,9 +25,6 @@ struct gb_pwm_chip {
 	container_of(chip, struct gb_pwm_chip, chip)
 
 
-/* Define get_version() routine */
-define_get_version(gb_pwm_chip, PWM);
-
 static int gb_pwm_count_operation(struct gb_pwm_chip *pwmc)
 {
 	struct gb_pwm_count_response response;
@@ -194,11 +189,6 @@ static int gb_pwm_connection_init(struct gb_connection *connection)
 	pwmc->connection = connection;
 	connection->private = pwmc;
 
-	/* Check for compatible protocol version */
-	ret = get_version(pwmc);
-	if (ret)
-		goto out_err;
-
 	/* Query number of pwms present */
 	ret = gb_pwm_count_operation(pwmc);
 	if (ret)