Update Cucumber CI dependencies

Allowing for newer Cucumber version for some builds, now that
Cucumber supports more versions of cucumber-gherkin.

Gemfile

@@ -5,7 +5,7 @@ gemspec
 
 
 gherkin_major_version_used = 29
-gherkin_major_versions_without_cucumber_support = [9, 11, 12, 16, 17, 19, 21, 27, 28, 29]
+gherkin_major_versions_without_cucumber_support = [9, 11, 12, 16, 17, 19, 21, 28, 29]
 
 # rubocop:disable Bundler/DuplicatedGem
 if RUBY_VERSION =~ /^2\.[34]/

testing/gemfiles/gherkin24.gemfile

@@ -6,8 +6,4 @@ if RUBY_VERSION =~ /^2\.3/
   gem 'childprocess', '< 4.0' # Requires Ruby 2.4 at this version
 end
 
-# Only versions of Cucumber that rely on the old `gherkin3` gem can be used
-# with versions of the gherkin gem for which there was never a cucumber release
-gem 'cucumber', '2.2.0'
-
 gem 'cucumber-gherkin', '~> 24.0'

testing/gemfiles/gherkin25.gemfile

@@ -2,8 +2,4 @@ source 'https://rubygems.org'
 
 gemspec path: '../../'
 
-# Only versions of Cucumber that rely on the old `gherkin3` gem can be used
-# with versions of the gherkin gem for which there was never a cucumber release
-gem 'cucumber', '2.2.0'
-
 gem 'cucumber-gherkin', '~> 25.0'

testing/gemfiles/gherkin26.gemfile

@@ -2,8 +2,4 @@ source 'https://rubygems.org'
 
 gemspec path: '../../'
 
-# Only versions of Cucumber that rely on the old `gherkin3` gem can be used
-# with versions of the gherkin gem for which there was never a cucumber release
-gem 'cucumber', '2.2.0'
-
 gem 'cucumber-gherkin', '~> 26.0'

testing/gemfiles/gherkin27.gemfile

@@ -2,8 +2,4 @@ source 'https://rubygems.org'
 
 gemspec path: '../../'
 
-# Only versions of Cucumber that rely on the old `gherkin3` gem can be used
-# with versions of the gherkin gem for which there was never a cucumber release
-gem 'cucumber', '2.2.0'
-
 gem 'cucumber-gherkin', '~> 27.0'