Remove incrementCounter utility

modules/utils/incrementCounter.js

@@ -1,13 +0,0 @@
-import db from './data';
-
-export default function incrementCounter(counter, key, by = 1) {
-  return new Promise((resolve, reject) => {
-    db.hincrby(counter, key, by, (error, value) => {
-      if (error) {
-        reject(error);
-      } else {
-        resolve(value);
-      }
-    });
-  });
-}