diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
index 63aa74e09bb1a2..506ed721d0843e 100644
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -497,7 +497,6 @@ set(files
   __locale_dir/locale_base_api/fuchsia.h
   __locale_dir/locale_base_api/ibm.h
   __locale_dir/locale_base_api/musl.h
-  __locale_dir/locale_base_api/newlib.h
   __locale_dir/locale_base_api/openbsd.h
   __locale_dir/locale_base_api/win32.h
   __locale_dir/locale_guard.h
diff --git a/libcxx/include/__locale_dir/locale_base_api.h b/libcxx/include/__locale_dir/locale_base_api.h
index 8c000c558c5279..eab7fa8bf62fae 100644
--- a/libcxx/include/__locale_dir/locale_base_api.h
+++ b/libcxx/include/__locale_dir/locale_base_api.h
@@ -15,10 +15,6 @@
 #  include <__locale_dir/locale_base_api/ibm.h>
 #elif defined(__ANDROID__)
 #  include <__locale_dir/locale_base_api/android.h>
-#elif defined(__sun__)
-#  include <__locale_dir/locale_base_api/solaris.h>
-#elif defined(_NEWLIB_VERSION)
-#  include <__locale_dir/locale_base_api/newlib.h>
 #elif defined(__OpenBSD__)
 #  include <__locale_dir/locale_base_api/openbsd.h>
 #elif defined(__Fuchsia__)
diff --git a/libcxx/include/__locale_dir/locale_base_api/newlib.h b/libcxx/include/__locale_dir/locale_base_api/newlib.h
deleted file mode 100644
index 7da10e5889843d..00000000000000
--- a/libcxx/include/__locale_dir/locale_base_api/newlib.h
+++ /dev/null
@@ -1,12 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_NEWLIB_H
-#define _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_NEWLIB_H
-
-#endif // _LIBCPP___LOCALE_DIR_LOCALE_BASE_API_NEWLIB_H
diff --git a/libcxx/include/module.modulemap b/libcxx/include/module.modulemap
index c79070c318759d..f92e8bf5fc9aba 100644
--- a/libcxx/include/module.modulemap
+++ b/libcxx/include/module.modulemap
@@ -1451,7 +1451,6 @@ module std [system] {
       textual header "__locale_dir/locale_base_api/fuchsia.h"
       textual header "__locale_dir/locale_base_api/ibm.h"
       textual header "__locale_dir/locale_base_api/musl.h"
-      textual header "__locale_dir/locale_base_api/newlib.h"
       textual header "__locale_dir/locale_base_api/openbsd.h"
       textual header "__locale_dir/locale_base_api/win32.h"
     }