Remove more empty headers (#20155)

keyboards/flehrad/downbubble/downbubble.c

@@ -1,16 +0,0 @@
-/* Copyright 2018 REPLACE_WITH_YOUR_NAME
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "downbubble.h"

keyboards/flehrad/numbrero/numbrero.c

@@ -1 +0,0 @@
-#include "numbrero.h"

keyboards/flehrad/snagpad/snagpad.c

@@ -1 +0,0 @@
-#include "snagpad.h"

keyboards/flehrad/tradestation/tradestation.c

@@ -1,16 +0,0 @@
-/* Copyright 2019 flehrad
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "tradestation.h"