Delete bundled copy of NSS and replace with README.

nspr/pr/src/md/unix/os_Darwin_x86_64.s

Index: nspr/pr/src/md/unix/os_Darwin_x86_64.s
diff --git a/nspr/pr/src/md/unix/os_Darwin_x86_64.s b/nspr/pr/src/md/unix/os_Darwin_x86_64.s
deleted file mode 100644
index 449aaa5db68dca8bb29b1f4e601dd5f8ded15364..0000000000000000000000000000000000000000
--- a/nspr/pr/src/md/unix/os_Darwin_x86_64.s
+++ /dev/null
@@ -1,67 +0,0 @@
-# -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
-# 
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-# PRInt32 __PR_Darwin_x86_64_AtomicIncrement(PRInt32 *val)
-#
-# Atomically increment the integer pointed to by 'val' and return
-# the result of the increment.
-#
-    .text
-    .globl __PR_Darwin_x86_64_AtomicIncrement
-    .private_extern __PR_Darwin_x86_64_AtomicIncrement
-    .align 4
-__PR_Darwin_x86_64_AtomicIncrement:
-    movl $1, %eax
-    lock
-    xaddl %eax, (%rdi)
-    incl %eax
-    ret
-
-# PRInt32 __PR_Darwin_x86_64_AtomicDecrement(PRInt32 *val)
-#
-# Atomically decrement the integer pointed to by 'val' and return
-# the result of the decrement.
-#
-    .text
-    .globl __PR_Darwin_x86_64_AtomicDecrement
-    .private_extern __PR_Darwin_x86_64_AtomicDecrement
-    .align 4
-__PR_Darwin_x86_64_AtomicDecrement:
-    movl $-1, %eax
-    lock
-    xaddl %eax, (%rdi)
-    decl %eax
-    ret
-
-# PRInt32 __PR_Darwin_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval)
-#
-# Atomically set the integer pointed to by 'val' to the new
-# value 'newval' and return the old value.
-#
-    .text
-    .globl __PR_Darwin_x86_64_AtomicSet
-    .private_extern __PR_Darwin_x86_64_AtomicSet
-    .align 4
-__PR_Darwin_x86_64_AtomicSet:
-    movl %esi, %eax
-    xchgl %eax, (%rdi)
-    ret
-
-# PRInt32 __PR_Darwin_x86_64_AtomicAdd(PRInt32 *ptr, PRInt32 val)
-#
-# Atomically add 'val' to the integer pointed to by 'ptr'
-# and return the result of the addition.
-#
-    .text
-    .globl __PR_Darwin_x86_64_AtomicAdd
-    .private_extern __PR_Darwin_x86_64_AtomicAdd
-    .align 4
-__PR_Darwin_x86_64_AtomicAdd:
-    movl %esi, %eax
-    lock
-    xaddl %eax, (%rdi)
-    addl %esi, %eax
-    ret