net: remove named parameters in Listener.Accept doc signature

They added no value.

Change-Id: I9e690379d2dfd983266de0ea5231f2b57c8b1517
Reviewed-on: https://go-review.googlesource.com/14568Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/net/net.go

@@ -345,7 +345,7 @@ var listenerBacklog = maxListenerBacklog()
 // Multiple goroutines may invoke methods on a Listener simultaneously.
 type Listener interface {
 	// Accept waits for and returns the next connection to the listener.
-	Accept() (c Conn, err error)
+	Accept() (Conn, error)
 
 	// Close closes the listener.
 	// Any blocked Accept operations will be unblocked and return errors.