Remove unnecessary IS_COMMAND definitions from recently added keyboards (#5065)

keyboards/scarletbandana/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"
 
@@ -54,10 +53,3 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #endif
 
 #define DEBOUNCING_DELAY 5
-
-/* key combination for command */
-#define IS_COMMAND() ( \
-    keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
-)
-
-#endif