remove unnecessary IIFE

app/assets/javascripts/network/network_bundle.js

@@ -3,17 +3,15 @@
 
 import Network from './network';
 
-(function() {
-  $(function() {
-    if (!$(".network-graph").length) return;
+$(function() {
+  if (!$(".network-graph").length) return;
 
-    var network_graph;
-    network_graph = new Network({
-      url: $(".network-graph").attr('data-url'),
-      commit_url: $(".network-graph").attr('data-commit-url'),
-      ref: $(".network-graph").attr('data-ref'),
-      commit_id: $(".network-graph").attr('data-commit-id')
-    });
-    return new ShortcutsNetwork(network_graph.branch_graph);
+  var network_graph;
+  network_graph = new Network({
+    url: $(".network-graph").attr('data-url'),
+    commit_url: $(".network-graph").attr('data-commit-url'),
+    ref: $(".network-graph").attr('data-ref'),
+    commit_id: $(".network-graph").attr('data-commit-id')
   });
-}).call(window);
+  return new ShortcutsNetwork(network_graph.branch_graph);
+});