Revert "Can't reliably reproduce this bug"

This reverts commit 55d2a1d.

Author: xionon

test/view_helper_test.rb

@@ -66,6 +66,10 @@ class ViewHelperTest < ActionDispatch::IntegrationTest
     page.execute_script('Turbolinks.visit("/pages/2");')
     assert page.has_content?('Hello Alice')
 
+    # Sometimes Turbolinks isn't available right away. We need to wait for a brief moment
+    # for phantomJS to finish loading javascript.
+    sleep(0.1)
+
     page.execute_script('Turbolinks.visit("/pages/1");')
     assert page.has_content?('Hello Bob')