Change include guards in quantum/ to pragma once (#11239)

quantum/process_keycode/process_tap_dance.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 PROCESS_TAP_DANCE_H
-#define PROCESS_TAP_DANCE_H
+
+#pragma once
 
 #ifdef TAP_DANCE_ENABLE
 
@@ -101,5 +101,3 @@ void qk_tap_dance_dual_role_reset(qk_tap_dance_state_t *state, void *user_data);
 #    define TD(n) KC_NO
 
 #endif
-
-#endif