Cleanup Default Keymaps (#5442)

* Cleanup Default Keymaps to conform to QMK Firmware standards

* Minor fixes

* Revert some changes

keyboards/cospad/keymaps/default/keymap.c

@@ -1,10 +1,6 @@
 #include QMK_KEYBOARD_H
 #include "led.h"
 
-#ifdef RGBLIGHT_ENABLE
-#include "rgblight.h"
-#endif
-
 // Each layer gets a name for readability, which is then used in the keymap matrix below.
 // The underscores don't mean anything - you can have a layer called STUFF or any other name.
 // Layer names don't all need to be of the same length, obviously, and you can also skip them