[Keybooard] Update of Ergodash Keyboard (#5772)

* Simpler coding

use SPLIT_KEYBOARD
delete rev1 (rev2→rev1)  because rev1is not sold

* delete USE_I2C = no

* Update readme.md

keyboards/ergodash/mini/keymaps/default/config.h

@@ -20,6 +20,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
+
 /* Use I2C or Serial, not both */
 
 #define USE_SERIAL
@@ -30,10 +31,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MASTER_LEFT
 // #define MASTER_RIGHT
 // #define EE_HANDS
-
-#undef RGBLED_NUM
-#define RGBLIGHT_ANIMATIONS
-#define RGBLED_NUM 20
-#define RGBLIGHT_HUE_STEP 10
-#define RGBLIGHT_SAT_STEP 17
-#define RGBLIGHT_VAL_STEP 17