Removes unnecessary comment

Removes an extraneous comment from the error handling logic, improving code clarity.

src/App.vue

@@ -61,7 +61,6 @@ window.onerror = (msg, url, line, col, error) => {
 
     // If you return true, then error alerts (like in older versions of
     // Internet Explorer) will be suppressed.
-    // Additonal comment for test
     var suppressErrorAlert = true;
     return suppressErrorAlert;
 };