Remove useless "ifdef KEYBOARD_*" (#20078)

Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/jorne/jorne.c

@@ -1,6 +1,6 @@
 // Copyright 2021 Joric (@joric)
 // SPDX-License-Identifier: GPL-2.0-or-later
-#include "jorne.h"
+#include "quantum.h"
 
 #ifdef OLED_ENABLE
 static void render_logo(void) {

keyboards/jorne/jorne.h

@@ -1,9 +0,0 @@
-// Copyright 2021 Joric (@joric)
-// SPDX-License-Identifier: GPL-2.0-or-later
-#pragma once
-
-#ifdef KEYBOARD_jorne_rev1
-#    include "rev1.h"
-#endif
-
-#include "quantum.h"

keyboards/jorne/rev1/rev1.c

@@ -1,3 +0,0 @@
-// Copyright 2021 Joric (@joric)
-// SPDX-License-Identifier: GPL-2.0-or-later
-#include "rev1.h"

keyboards/jorne/rev1/rev1.h

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once
 
-#include "jorne.h"
+#include "quantum.h"
 
 /* This a shortcut to help you visually see your layout.
  *