explicit exit not needed

Examples/Echo.py

@@ -340,4 +340,3 @@ if __name__ == "__main__":
                 client(args.destination, configarg, timeout=timeoutarg)
     except KeyboardInterrupt:
         print("")
-        exit()

Examples/Link.py

@@ -300,4 +300,3 @@ if __name__ == "__main__":
 
     except KeyboardInterrupt:
         print("")
-        exit()