diff --git a/libraries/AP_Filesystem/AP_Filesystem_Available.h b/libraries/AP_Filesystem/AP_Filesystem_Available.h
deleted file mode 100644
index c9b8bc9e8e0..00000000000
--- a/libraries/AP_Filesystem/AP_Filesystem_Available.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
-   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 3 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/>.
- */
-
-// minimal header for checking if AP_FS is available
-
-#pragma once
-
-#include <AP_HAL/AP_HAL_Boards.h>
-
-#if HAL_OS_POSIX_IO || HAL_OS_FATFS_IO
-#define HAVE_FILESYSTEM_SUPPORT 1
-#else
-#define HAVE_FILESYSTEM_SUPPORT 0
-#endif