diff --git a/libc/arch-arm/include/machine/cpu-features.h b/libc/arch-arm/include/machine/cpu-features.h
deleted file mode 100644
index a46149b..0000000
--- a/libc/arch-arm/include/machine/cpu-features.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-#ifndef _ARM_MACHINE_CPU_FEATURES_H
-#define _ARM_MACHINE_CPU_FEATURES_H
-
-// cpu-features.h is deprecated, so warn if it is included //
-#warning cpu-features.h is deprecated
-
-/* __ARM_ARCH__ is a number corresponding to the ARM revision
- * we're going to support. Our toolchain doesn't define __ARM_ARCH__
- * so try to guess it.
- */
-#ifndef __ARM_ARCH__
-#  if defined __ARM_ARCH_7__   || defined __ARM_ARCH_7A__ || \
-        defined __ARM_ARCH_7R__  || defined __ARM_ARCH_7M__
-#    define __ARM_ARCH__ 7
-#  elif defined __ARM_ARCH_6__   || defined __ARM_ARCH_6J__ || \
-        defined __ARM_ARCH_6K__  || defined __ARM_ARCH_6Z__ || \
-        defined __ARM_ARCH_6KZ__ || defined __ARM_ARCH_6T2__
-#    define __ARM_ARCH__ 6
-#  else
-#    error Unknown or unsupported ARM architecture
-#  endif
-#endif
-
-#endif /* _ARM_MACHINE_CPU_FEATURES_H */