Silence Telemetry WS errors (#904)

substrate/core/cli/src/lib.rs

@@ -517,7 +517,7 @@ fn init_logger(pattern: &str) {
 
 	let mut builder = env_logger::Builder::new();
 	// Disable info logging by default for some modules:
-	builder.filter(Some("ws"), log::LevelFilter::Warn);
+	builder.filter(Some("ws"), log::LevelFilter::Off);
 	builder.filter(Some("hyper"), log::LevelFilter::Warn);
 	// Enable info for others.
 	builder.filter(None, log::LevelFilter::Info);