FF58 now passes test - remove pending

spec/shared_selenium_session.rb

@@ -204,9 +204,6 @@ RSpec.shared_examples "Capybara::Session" do |session, mode|
 
     describe "Element#click" do
       it "should handle fixed headers/footers" do
-        if mode == :selenium_marionette && !(ENV['TRAVIS_ALLOW_FAILURE']=='true')
-          pending "geckodriver/firefox/marionette just fail to click without reporting an error - no way for us to detect/catch"
-        end
         @session.visit('/with_fixed_header_footer')
         # @session.click_link('Go to root')
         @session.find(:link, 'Go to root').click