[Keyboard] Zen keyboard update for Rev2 (#5522)

* Updated Zen keyboard for rev2 support

* Fixing r1 compile errors

* PR feedback and changes for Proton-C compile errors

keyboards/zen/config.h

@@ -15,17 +15,6 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #include "config_common.h"
-
-#endif  // CONFIG_H
-
-#undef  RGBLED_NUM
-#define RGBLIGHT_ANIMATIONS
-#define RGBLED_NUM 16
-
-#ifndef TAPPING_TERM
-#define TAPPING_TERM 100
-#endif