Delete bundled copy of NSS and replace with README.

patches/nspr-remove-io.patch

Index: patches/nspr-remove-io.patch
diff --git a/patches/nspr-remove-io.patch b/patches/nspr-remove-io.patch
deleted file mode 100644
index 3855ea1500c7466bd2e3736839ad43347730c8cf..0000000000000000000000000000000000000000
--- a/patches/nspr-remove-io.patch
+++ /dev/null
@@ -1,26 +0,0 @@
-diff --git a/pr/include/md/_win95.h b/pr/include/md/_win95.h
-index d65e264..1da2b55 100644
---- a/pr/include/md/_win95.h
-+++ b/pr/include/md/_win95.h
-@@ -32,8 +32,6 @@
- 
- #define HAVE_DLL
- #undef  HAVE_THREAD_AFFINITY
--#define _PR_HAVE_GETADDRINFO
--#define _PR_INET6_PROBE
- #ifndef _PR_INET6
- #define AF_INET6 23
- /* newer ws2tcpip.h provides these */
-diff --git a/pr/src/io/prio.c b/pr/src/io/prio.c
-index 78cbdf5..f69927f 100644
---- a/pr/src/io/prio.c
-+++ b/pr/src/io/prio.c
-@@ -58,8 +58,6 @@ void _PR_InitIO(void)
-     _PR_MD_INIT_FD_INHERITABLE(_pr_stdin, PR_TRUE);
-     _PR_MD_INIT_FD_INHERITABLE(_pr_stdout, PR_TRUE);
-     _PR_MD_INIT_FD_INHERITABLE(_pr_stderr, PR_TRUE);
--
--    _PR_MD_INIT_IO();
- }
- 
- void _PR_CleanupIO(void)