Remove unnecessary if condition.

main.go

@@ -270,8 +270,8 @@ func main() {
 	// Also for listening mode and Ox key handling.
 	if !*flagInteractive && !*flagListen && *flagHTTPUpload == "" &&
 		!*flagOxDeleteNodes && *flagOxImportPrivKey == "" &&
-		!*flagOxGenPrivKeyX25519 && !*flagOxGenPrivKeyRSA {
-		if message == "" {
+		!*flagOxGenPrivKeyX25519 && !*flagOxGenPrivKeyRSA &&
+		message == "" {
 
 		scanner := bufio.NewScanner(os.Stdin)
 		for scanner.Scan() {
@@ -289,7 +289,6 @@ func main() {
 			}
 		}
 	}
-	}
 
 	// Remove invalid code points.
 	message = validUTF8(message)