Delete bundled copy of NSS and replace with README.

nspr/pr/include/obsolete/prsem.h

Index: nspr/pr/include/obsolete/prsem.h
diff --git a/nspr/pr/include/obsolete/prsem.h b/nspr/pr/include/obsolete/prsem.h
deleted file mode 100644
index ee313cb2f5c6887b6338d1ea027600f29bc79bb4..0000000000000000000000000000000000000000
--- a/nspr/pr/include/obsolete/prsem.h
+++ /dev/null
@@ -1,64 +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/. */
-
-#ifndef prsem_h___
-#define prsem_h___
-
-/*
-** API for counting semaphores. Semaphores are counting synchronizing 
-** variables based on a lock and a condition variable.  They are lightweight 
-** contention control for a given count of resources.
-*/
-#include "prtypes.h"
-
-PR_BEGIN_EXTERN_C
-
-typedef struct PRSemaphore PRSemaphore;
-
-/*
-** Create a new semaphore object.
-*/
-NSPR_API(PRSemaphore*) PR_NewSem(PRUintn value);
-
-/*
-** Destroy the given semaphore object.
-**
-*/
-NSPR_API(void) PR_DestroySem(PRSemaphore *sem);
-
-/*
-** Wait on a Semaphore.
-** 
-** This routine allows a calling thread to wait or proceed depending upon the 
-** state of the semahore sem. The thread can proceed only if the counter value 
-** of the semaphore sem is currently greater than 0. If the value of semaphore 
-** sem is positive, it is decremented by one and the routine returns immediately 
-** allowing the calling thread to continue. If the value of semaphore sem is 0, 
-** the calling thread blocks awaiting the semaphore to be released by another 
-** thread.
-** 
-** This routine can return PR_PENDING_INTERRUPT if the waiting thread 
-** has been interrupted.
-*/
-NSPR_API(PRStatus) PR_WaitSem(PRSemaphore *sem);
-
-/*
-** This routine increments the counter value of the semaphore. If other threads 
-** are blocked for the semaphore, then the scheduler will determine which ONE 
-** thread will be unblocked.
-*/
-NSPR_API(void) PR_PostSem(PRSemaphore *sem);
-
-/*
-** Returns the value of the semaphore referenced by sem without affecting
-** the state of the semaphore.  The value represents the semaphore vaule
-F** at the time of the call, but may not be the actual value when the
-** caller inspects it.
-*/
-NSPR_API(PRUintn) PR_GetValueSem(PRSemaphore *sem);
-
-PR_END_EXTERN_C
-
-#endif /* prsem_h___ */