Revert commit 14524, which builds NSS and NSPR libraries, for secure networking.

runtime/bin/bin.gypi

Index: runtime/bin/bin.gypi
diff --git a/runtime/bin/bin.gypi b/runtime/bin/bin.gypi
index c6da03c674fa88eb686246594d33159c21ffd48b..07321dc8934ad07a561c71b0873edbd53745369c 100644
--- a/runtime/bin/bin.gypi
+++ b/runtime/bin/bin.gypi
@@ -260,7 +260,6 @@
         'generate_json_cc_file',
         'generate_uri_cc_file',
         'generate_utf_cc_file',
-        'nss',
       ],
       'include_dirs': [
         '..',
@@ -304,28 +303,6 @@
       ],
     },
     {
-      'target_name': 'nss',
-      'type': 'none',
-      'dependencies': [
-        'bin/net/nss.gyp:nss',
-        'bin/net/nss.gyp:nspr',
-        'bin/net/nss.gyp:nssckbi',
-        'bin/net/nss.gyp:nss_static',
-        'bin/net/ssl.gyp:libssl',
-        'bin/net/zlib.gyp:zlib',
-        'bin/net/sqlite.gyp:sqlite',
-      ],
-      'export_dependent_settings': [
-        'bin/net/nss.gyp:nss',
-        'bin/net/nss.gyp:nspr',
-        'bin/net/nss.gyp:nssckbi',
-        'bin/net/nss.gyp:nss_static',
-        'bin/net/ssl.gyp:libssl',
-        'bin/net/zlib.gyp:zlib',
-        'bin/net/sqlite.gyp:sqlite',
-      ],
-    },
-    {
       'target_name': 'libdart_withcore',
       'type': 'static_library',
       'dependencies': [