use User instead of EndPoint for event sender

src/main/java/fr/ill/ics/bridge/events/ChatEvent.java

@@ -84,25 +84,7 @@ public class ChatEvent {
 		}
 	}
 
-	public String getFormattedSender() {
-		if (formattedSender == null) {
-			formattedSender = formatEndPoint(sender);
-		}
-		return formattedSender;
-	}
-
 	public boolean comesFromServer() {
 		return sender.equals(NOMAD);
 	}
-	
-	public static String formatEndPoint(String endPoint) {
-		String formattedEndPoint = endPoint.replace("tcp://", "");
-		int index = formattedEndPoint.indexOf(":");
-		if (index != -1) {
-			formattedEndPoint = formattedEndPoint.substring(0, index);
-		}
-		return formattedEndPoint;
-	}
-	
-	
 }
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