remove scraper module

scraper/lib/promises.js

@@ -1,57 +0,0 @@
-/**
- * Execute promises in sequence one after another.
- */
-async function sequence(promises) {
-  return promises.reduce((promise, func) =>
-      promise.then(result => func().then(Array.prototype.concat.bind(result))), Promise.resolve([]));
-}
-
-/**
- * Return first resolved promise as the result.
- */
-async function first(promises) {
-  return Promise.all(promises.map((p) => {
-    // If a request fails, count that as a resolution so it will keep
-    // waiting for other possible successes. If a request succeeds,
-    // treat it as a rejection so Promise.all immediately bails out.
-    return p.then(
-        (val) => Promise.reject(val),
-        (err) => Promise.resolve(err)
-    );
-  })).then(
-      // If '.all' resolved, we've just got an array of errors.
-      (errors) => Promise.reject(errors),
-      // If '.all' rejected, we've got the result we wanted.
-      (val) => Promise.resolve(val)
-  );
-}
-
-/**
- * Delay promise
- */
-async function delay(duration) {
-  return new Promise((resolve) => setTimeout(resolve, duration));
-}
-
-/**
- * Timeout promise after a set time in ms
- */
-async function timeout(timeoutMs, promise, message = 'Timed out') {
-  return Promise.race([
-    promise,
-    new Promise(function (resolve, reject) {
-      setTimeout(function () {
-        reject(message);
-      }, timeoutMs);
-    })
-  ]);
-}
-
-/**
- * Return most common value from given array.
- */
-function mostCommonValue(array) {
-  return array.sort((a, b) => array.filter(v => v === a).length - array.filter(v => v === b).length).pop();
-}
-
-module.exports = { sequence, first, delay, timeout, mostCommonValue };