Bug 1004781: Actually remove the pinset (r=keeler)

security/manager/tools/PreloadedHPKPins.json

@@ -226,10 +226,7 @@
     // twitterCDN. More specific rules take precedence because we search for
     // exact domain name first.
     { "name": "twitter.com", "include_subdomains": true,
-      "pins": "twitterCDN", "test_mode": false },
-    // Facebook (not pinned by Chrome)
-    { "name": "facebook.com", "include_subdomains": true,
-      "pins": "facebook", "test_mode": true }
+      "pins": "twitterCDN", "test_mode": false }
   ],
 
   "extra_certificates": [