Have hexwire Iris keymap use I2C

keyboards/keebio/iris/keymaps/hexwire/config.h

@@ -20,14 +20,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "config_common.h"
 
-/* Use I2C or Serial, not both */
-
-#define USE_SERIAL
-// #define USE_I2C
+#define USE_I2C
 
 /* Select hand configuration */
-
-#define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS