Change keyboard level include guards to pragma once (#14248)

* Change keyboard level include guards to `pragma once`

And clean up a lot of layout macros

* Oops

* Remove dangling endif

keyboards/fleuron/config.h

@@ -15,8 +15,7 @@ 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"
 
@@ -160,5 +159,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_DI_PIN E6     // The pin the LED strip is connected to
 #define RGBLED_NUM 18     // Number of LEDs in your strip
 #define RGBLIGHT_ANIMATIONS
-
-#endif