remove feature flags

cluster/prod/app/jitsi/config/config.js

@@ -648,20 +648,6 @@ var config = {
     // Sets the conference subject
     // subject: 'Conference Subject',
 
-     // Feature Flags.
-    flags: {
-        // Enables source names in the signaling.
-        sourceNameSignaling: false,
-
-        // Enables sending multiple video streams, i.e., camera and desktop tracks can be shared in the conference
-        // separately as two different streams instead of one composite stream.
-        sendMultipleVideoStreams: false,
-
-        // Signal that this client supports receiving multiple video streams. Without this flag jicofo will enable
-        // multi-stream backward compatibility.
-        receiveMultipleVideoStreams: false,
-    },
-
     // List of undocumented settings used in jitsi-meet
     /**
      _immediateReloadThreshold