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/namecard2x4/namecard2x4.h

@@ -13,8 +13,8 @@
  * 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 NAMECARD2X4_H
-#define NAMECARD2X4_H
+
+#pragma once
 
 #include "quantum.h"
 
@@ -24,10 +24,8 @@
 // The second converts the arguments into a two-dimensional array
 #define LAYOUT( \
     k00, k01, k02, k03, \
-    k10, k11, k12, k13   \
+    k10, k11, k12, k13 \
 ) { \
     { k00, k01, k02, k03 }, \
-    { k10, k11, k12, k13 }, \
+    { k10, k11, k12, k13 } \
 }
-
-#endif