metrics: disable debugs

src/metrics.js

@@ -190,8 +190,6 @@ async function sendToGraphite() {
     return new Promise((resolve) => {
         const client = new net.Socket();
         client.connect(constants.GRAPHITE_PORT, '127.0.0.1', () => {
-            debug('connected to graphite');
-
             const now = Math.floor(Date.now() / 1000);
 
             for (const metric of graphiteMetrics) {
@@ -201,14 +199,11 @@ async function sendToGraphite() {
         });
 
         client.on('error', (error) => {
-            debug(error);
+            debug(`Error sending data to graphite: ${error.message}`);
             resolve();
         });
 
-        client.on('end', () => {
-            debug('sent to graphite');
-            resolve();
-        });
+        client.on('end', () => resolve());
     });
 }