greybus: manifest: drop interface-version field

It is not required anymore. Drop it.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_manifest.h

@@ -82,7 +82,6 @@ struct greybus_descriptor_string {
  * *not* the functions within it.
  */
 struct greybus_descriptor_interface {
-	__le16	version;	// TODO - remove after Dec demo.
 	__u8	vendor_stringid;
 	__u8	product_stringid;
 } __packed;