Skip installing webdrivers on Ruby 3+

selenium-webdriver will be able to download drivers itself

Author: pirj

example_app_generator/generate_app.rb

@@ -23,6 +23,7 @@
   gsub_file "Gemfile", /.*debug.*/, ''
   gsub_file "Gemfile", /.*puma.*/, ''
   gsub_file "Gemfile", /.*bootsnap.*/, ''
+  gsub_file "Gemfile", /.*chromedriver-helper.*/, '' if RUBY_VERSION >= "3.0"
 
   append_to_file 'Gemfile', "gem 'rails-controller-testing'\n"