Cleanup Default Keymaps (#5442)

* Cleanup Default Keymaps to conform to QMK Firmware standards

* Minor fixes

* Revert some changes

keyboards/contra/keymaps/default/config.h

@@ -1,7 +1,5 @@
-#ifndef CONFIG_USER_H
-#define CONFIG_USER_H
+#pragma once
 
-#include "config_common.h"
 
 #ifdef AUDIO_ENABLE
     #define STARTUP_SONG SONG(PLANCK_SOUND)
@@ -25,7 +23,7 @@
 /* enable basic MIDI features:
    - MIDI notes can be sent when in Music mode is on
 */
-                                
+
 #define MIDI_BASIC
 
 /* enable advanced MIDI features:
@@ -38,5 +36,3 @@
 
 /* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
 //#define MIDI_TONE_KEYCODE_OCTAVES 2
-
-#endif