Removed Do-Not-Track handling

lib/contentPolicy.js

Index: lib/contentPolicy.js
===================================================================
--- a/lib/contentPolicy.js
+++ b/lib/contentPolicy.js
@@ -473,35 +473,16 @@ let PolicyImplementation =
         }
         break;
       }
       case "http-on-modify-request":
       {
         if (!(subject instanceof Ci.nsIHttpChannel))
           return;
 
-        if (Prefs.enabled)
-        {
-          let match = defaultMatcher.matchesAny(subject.URI.spec, "DONOTTRACK", null, false);
-          if (match && match instanceof BlockingFilter)
-          {
-            FilterStorage.increaseHitCount(match);
-            subject.setRequestHeader("DNT", "1", false);
-
-            // Bug 23845 - Some routers are broken and cannot handle DNT header
-            // following Connection header. Make sure Connection header is last.
-            try
-            {
-              let connection = subject.getRequestHeader("Connection");
-              subject.setRequestHeader("Connection", null, false);
-              subject.setRequestHeader("Connection", connection, false);
-            } catch(e) {}
-          }
-        }
-
         if (this.previousRequest && subject.URI == this.previousRequest[0] &&
             subject instanceof Ci.nsIWritablePropertyBag)
         {
           // We just handled a content policy call for this request - associate
           // the data with the channel so that we can find it in case of a redirect.
           subject.setProperty("abpRequestType", this.previousRequest[1]);
           this.previousRequest = null;
         }