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/treasure/type9/type9.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 TYPE9_H
-#define TYPE9_H
+
+#pragma once
 
 #include "quantum.h"
 
@@ -26,15 +26,12 @@
  * The second converts the arguments into a two-dimensional array which
  * represents the switch matrix.
  */
-#define LAYOUT(    \
-    K00, K01, K02, \
-    K10, K11, K12, \
-    K20, K21, K22  \
-) \
-{ \
-    { K00, K01, K02 }, \
-    { K10, K11, K12 }, \
-    { K20, K21, K22 }, \
+#define LAYOUT( \
+    k00, k01, k02, \
+    k10, k11, k12, \
+    k20, k21, k22 \
+) { \
+    { k00, k01, k02 }, \
+    { k10, k11, k12 }, \
+    { k20, k21, k22 } \
 }
-
-#endif