remove guards and functionality specific to 6.18
remove guards and functionality specific to 6.18

jkotests/watir-webdriver,titusfortner/watir-webdriver,watir/watir,jkotests/watir-webdriver,titusfortner/watir,jkotests/watir,jkotests/watir,jkotests/watir,watir/watir,watir/watir,titusfortner/watir,watir/watir,titusfortner/watir,titusfortner/watir-webdriver,jkotests/watir,titusfortner/watir