Remove silenced warning by requiring necessary file (#758)

Selenium::WebDriver::Remote::COMMANDS does not exist but instead it's
Selenium::WebDriver::Remote::Bridge::COMMANDS, defined in
selenium/webdriver/remote/commands

https://github.com/SeleniumHQ/selenium/blob/selenium-4.7.1-ruby/rb/lib/selenium/webdriver/remote.rb#L30

test/application_system_test_case.rb

@@ -2,6 +2,7 @@
 
 require "test_helper"
 require "webdrivers/chromedriver"
+require "selenium/webdriver/remote/commands"
 require "action_dispatch/system_testing/server"
 
 ActionDispatch::SystemTesting::Server.silence_puma = true

test/test_helper.rb

@@ -40,11 +40,6 @@
 module Warning
   class << self
     def warn(message)
-      # gems/selenium-webdriver-4.7.1/lib/selenium/webdriver/remote/bridge.rb:633:
-      # warning: Expected selenium/webdriver/remote/commands
-      # to define Selenium::WebDriver::Remote::COMMANDS but it didn't
-      return if message.match?(/Selenium::WebDriver::Remote::COMMANDS/)
-
       raise message.to_s
     end
   end