Remove rack-jekyll for security, not needed of gh page hosting for docs

docs/Gemfile

@@ -1,10 +1,5 @@
 source "https://rubygems.org"
 
-# gem 'wdm'
-
-# gem 'documentation-theme-jekyll', github: 'elrayle/documentation-theme-jekyll', branch: 'gh-pages'
-
-# gem 'github-pages', group: :jekyll_plugins
 gem 'ffi'
 gem 'github-pages' # plugins will not run if group: :jekyll_plugins is used
 gem 'html-proofer'
@@ -20,16 +15,6 @@ group :development, :test do
   gem "webdrivers"
   gem "capybara"
   gem 'launchy'
-  gem "rack-jekyll"
   gem "pry-byebug"
   gem 'rspec_junit_formatter'
 end
-
-if ENV['RAILS_VERSION']
-  if ENV['RAILS_VERSION'] == 'edge'
-    gem 'rails', github: 'rails/rails'
-    ENV['ENGINE_CART_RAILS_OPTIONS'] = '--edge --skip-turbolinks'
-  else
-    gem 'rails', ENV['RAILS_VERSION']
-  end
-end

docs/Gemfile.lock

@@ -252,11 +252,7 @@ GEM
       pry (>= 0.13, < 0.15)
     public_suffix (4.0.7)
     racc (1.6.2)
-    rack (1.6.13)
-    rack-jekyll (0.5.0)
-      jekyll (>= 1.3)
-      listen (>= 1.3)
-      rack (~> 1.5)
+    rack (3.0.7)
     rack-test (2.1.0)
       rack (>= 1.3)
     rainbow (3.1.1)
@@ -332,7 +328,6 @@ DEPENDENCIES
   launchy
   nokogiri
   pry-byebug
-  rack-jekyll
   rake
   rspec
   rspec_junit_formatter