Removing guard for cookie manager test in Ruby

Author: diemol

.skipped-tests

@@ -51,6 +51,4 @@
 -//rb/spec/integration/selenium/webdriver:element-chrome
 -//rb/spec/integration/selenium/webdriver:element-chrome-bidi
 -//rb/spec/integration/selenium/webdriver:element-chrome-remote
--//rb/spec/integration/selenium/webdriver:manager-firefox-beta
--//rb/spec/integration/selenium/webdriver:manager-firefox-beta-remote
 -//rb:lint

rb/spec/integration/selenium/webdriver/manager_spec.rb

@@ -169,9 +169,7 @@ module WebDriver
           end
 
           it 'does not allow adding with value None when secure is false',
-             except: [{browser: :firefox,
-                       reason: 'https://github.com/mozilla/geckodriver/issues/1842'},
-                      {browser: %i[safari safari_preview]}] do
+             except: [{browser: %i[safari safari_preview]}] do
             expect {
               driver.manage.add_cookie name: 'samesite',
                                        value: 'none-insecure',