[Keymap] Updated my iris, planck, and xd75 keymaps (#5515)

* Updated iris, planck, and xd75 keymaps

* Added brightness down and up to commented layout of Symbol layer.

* updated config files for planck and iris

* removed unnecessary include lines from iris and planck config files

keyboards/keebio/iris/keymaps/davidrambo/config.h

@@ -15,10 +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_USER_H
-#define CONFIG_USER_H
-
-#include "config_common.h"
+#pragma once
 
 /* Use I2C or Serial, not both */
 
@@ -39,6 +36,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_VAL_STEP 8
 */
 #define TAPPING_TERM 200
-#include "../../config.h"
 
-#endif
+