greybus: loopback: 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/loopback.c

@@ -31,8 +31,6 @@ struct gb_loopback_stats {
 
 struct gb_loopback {
 	struct gb_connection *connection;
-	u8 version_major;
-	u8 version_minor;
 
 	struct kfifo kfifo;
 	struct mutex mutex;
@@ -73,9 +71,6 @@ module_param(kfifo_depth, uint, 0444);
 
 #define GB_LOOPBACK_MS_WAIT_MAX				1000
 
-/* Define get_version() routine */
-define_get_version(gb_loopback, LOOPBACK);
-
 /* interface sysfs attributes */
 #define gb_loopback_ro_attr(field)					\
 static ssize_t field##_show(struct device *dev,				\
@@ -493,11 +488,6 @@ static int gb_loopback_connection_init(struct gb_connection *connection)
 		goto out_sysfs;
 	}
 
-	/* Check the version */
-	retval = get_version(gb);
-	if (retval)
-		goto out_minor;
-
 	/* Calculate maximum payload */
 	gb->size_max = gb_operation_get_payload_size_max(connection);
 	if (gb->size_max <= sizeof(struct gb_loopback_transfer_request)) {