diff --git a/Pal/include/bits/libc-tsd.h b/Pal/include/bits/libc-tsd.h
deleted file mode 100644
index 6d24a0d6..00000000
--- a/Pal/include/bits/libc-tsd.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/* libc-internal interface for thread-specific data.  Stub or TLS version.
-   Copyright (C) 1998,2001,2002,2008 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-#ifndef _GENERIC_BITS_LIBC_TSD_H
-#define _GENERIC_BITS_LIBC_TSD_H 1
-
-/* This file defines the following macros for accessing a small fixed
-   set of thread-specific `void *' data used only internally by libc.
-
-   __libc_tsd_define(CLASS, TYPE, KEY)	-- Define or declare a datum with TYPE
-   					   for KEY.  CLASS can be `static' for
-					   keys used in only one source file,
-					   empty for global definitions, or
-					   `extern' for global declarations.
-   __libc_tsd_address(TYPE, KEY)	-- Return the `TYPE *' pointing to
-   					   the current thread's datum for KEY.
-   __libc_tsd_get(TYPE, KEY)		-- Return the `TYPE' datum for KEY.
-   __libc_tsd_set(TYPE, KEY, VALUE)	-- Set the datum for KEY to VALUE.
-
-   The set of available KEY's will usually be provided as an enum,
-   and contains (at least):
-		_LIBC_TSD_KEY_MALLOC
-		_LIBC_TSD_KEY_DL_ERROR
-		_LIBC_TSD_KEY_RPC_VARS
-   All uses must be the literal _LIBC_TSD_* name in the __libc_tsd_* macros.
-   Some implementations may not provide any enum at all and instead
-   using string pasting in the macros.  */
-
-//#include <tls.h>
-
-/* When full support for __thread variables is available, this interface is
-   just a trivial wrapper for it.  Without TLS, this is the generic/stub
-   implementation for wholly single-threaded systems.
-
-   We don't define an enum for the possible key values, because the KEYs
-   translate directly into variables by macro magic.  */
-
-#if USE___THREAD
-# define __libc_tsd_define(CLASS, TYPE, KEY)	\
-  CLASS __thread TYPE __libc_tsd_##KEY attribute_tls_model_ie;
-
-# define __libc_tsd_address(TYPE, KEY)		(&__libc_tsd_##KEY)
-# define __libc_tsd_get(TYPE, KEY)		(__libc_tsd_##KEY)
-# define __libc_tsd_set(TYPE, KEY, VALUE)	(__libc_tsd_##KEY = (VALUE))
-#else
-# define __libc_tsd_define(CLASS, TYPE, KEY)	\
-  CLASS TYPE __libc_tsd_##KEY##_data;
-
-# define __libc_tsd_address(TYPE, KEY)		(&__libc_tsd_##KEY##_data)
-# define __libc_tsd_get(TYPE, KEY)		(__libc_tsd_##KEY##_data)
-# define __libc_tsd_set(TYPE, KEY, VALUE)	(__libc_tsd_##KEY##_data = (VALUE))
-#endif
-
-#endif	/* bits/libc-tsd.h */