Remove code dependencies to underscore

lib/modules/library_manager/npmTimer.js

@@ -39,6 +39,7 @@ class NpmTimer{
         else{
           // otherwise, find our download complete measurement
           entry = utils.last(items.getEntries().filter(entry => entry.name === this._downloadComplete));
+          
           if(entry){
             strDuration = __('Finished downloading and installing {{packageName}} {{version}} in {{duration}}ms', {packageName: this._packageName, version: this._version, duration: entry.duration});
             performance.clearMarks();

lib/utils/utils.js

@@ -447,6 +447,25 @@ function interceptLogs(consoleContext, logger) {
   };
 }
 
+function compact(array) {
+  return array.filter(n => n);
+}
+
+function groupBy(array, key) {
+  return array.reduce(function(rv, x) {
+    (rv[x[key]] = rv[x[key]] || []).push(x);
+    return rv;
+  }, {});
+}
+
+function sample(array) {
+  return array[Math.floor(Math.random() * array.length)];
+}
+
+function last(array) {
+  return array[array.length - 1];
+}
+
 module.exports = {
   joinPath,
   dirname,