Remove iife and eslint disable

spec/javascripts/behaviors/autosize_spec.js

-/* eslint-disable space-before-function-paren, no-var, comma-dangle, no-return-assign, max-len */
-
 import '~/behaviors/autosize';
 
-(function() {
-  describe('Autosize behavior', function() {
-    var load;
-    beforeEach(function() {
-      return setFixtures('<textarea class="js-autosize" style="resize: vertical"></textarea>');
+function load() {
+  $(document).trigger('load');
+}
+
+describe('Autosize behavior', () => {
+  beforeEach(() => {
+    setFixtures('<textarea class="js-autosize" style="resize: vertical"></textarea>');
   });
-    it('does not overwrite the resize property', function() {
+
+  it('does not overwrite the resize property', () => {
     load();
-      return expect($('textarea')).toHaveCss({
-        resize: 'vertical'
-      });
+    expect($('textarea')).toHaveCss({
+      resize: 'vertical',
     });
-    return load = function() {
-      return $(document).trigger('load');
-    };
   });
-}).call(window);
+});