Remove prototyping code which is commented out

This comments are ment for future development and not for the main
branch yet.

src/main.rs

@@ -63,7 +63,6 @@ struct MetricsConfig {
 #[derive(Debug, Deserialize, Serialize)]
 #[serde(deny_unknown_fields)]
 struct Config {
-    // default: Option<ConfigDefault>,
     metrics: Option<MetricsConfig>,
     hooks: BTreeMap<String, Hook>,
 }