README: Remove listener annotation

README

@@ -19,7 +19,7 @@ To run the stream server with the latest GStreamer in uninstalled environment:
 Application options:
 
   -u, --srt-uri=srt://address:port                   SRT stream URI.
-                                                     Default: srt://127.0.0.1:7001?mode=listener
+                                                     Default: srt://127.0.0.1:7001
   -r, --rist-addresses=address:port,address:port     Comma-separated list of addresses to send RIST packets to.
                                                      Default: 127.0.0.1:5004