Remove automatic double hangup

This was introduced in order to prevent the infinite busy ringtone.
Unfortunately it does not fix our sdes issue.

Refs #41441
diff --git a/src/org/sflphone/client/CallActivity.java b/src/org/sflphone/client/CallActivity.java
index e0dc4b2..12188f7 100644
--- a/src/org/sflphone/client/CallActivity.java
+++ b/src/org/sflphone/client/CallActivity.java
@@ -268,12 +268,12 @@
 
             @Override
             public void run() {
-                try {
+                /*try {
                     // We hang it up again to avoid infinite failure tone
                     mService.hangUp(mDisplayedConference.getId());
                 } catch (RemoteException e) {
                     e.printStackTrace();
-                }
+                }*/
                 finish();
             }
         };