Remove tests for unsupported legacy firefox

Rakefile

@@ -4,12 +4,6 @@ require 'cucumber/rake/task'
 require 'yard'
 
 desc "Run all examples with Firefox non-marionette"
-RSpec::Core::RakeTask.new(:spec_firefox) do |t|
-  t.rspec_opts = %w[--color]
-  # When we drop RSpec 2.x support we can rename spec_chrome.rb and implement this properly
-  # t.exclude_pattern = './spec/*{_chrome_spec.rb, _marionette_spec.rb}'
-  t.pattern = './spec{,/*/**}/*{_spec.rb,_spec_firefox.rb}'
-end
 
 RSpec::Core::RakeTask.new(:spec_marionette) do |t|
   t.rspec_opts = %w[--color]
@@ -40,8 +34,6 @@ end
 task :travis do
   if ENV['CAPYBARA_FF']
     Rake::Task[:spec_marionette].invoke
-  elsif ENV['CAPYBARA_LEGACY_FF']
-    Rake::Task[:spec_firefox].invoke
     Rake::Task[:cucumber].invoke
   else
     Rake::Task[:spec_chrome].invoke

spec/fixtures/selenium_driver_rspec_failure.rb

@@ -5,7 +5,6 @@ require 'selenium-webdriver'
 RSpec.describe Capybara::Selenium::Driver do
   it "should exit with a non-zero exit status" do
     options = { browser: (ENV['SELENIUM_BROWSER'] || :firefox).to_sym }
-    options[:desired_capabilities] = Selenium::WebDriver::Remote::Capabilities.firefox(marionette: false) if ENV['LEGACY_FIREFOX']
     browser = Capybara::Selenium::Driver.new(TestApp, options).browser
     expect(true).to eq(false)
   end

spec/fixtures/selenium_driver_rspec_success.rb

@@ -5,7 +5,6 @@ require 'selenium-webdriver'
 RSpec.describe Capybara::Selenium::Driver do
   it "should exit with a zero exit status" do
     options = { browser: (ENV['SELENIUM_BROWSER'] || :firefox).to_sym }
-    options[:desired_capabilities] = Selenium::WebDriver::Remote::Capabilities.firefox(marionette: false) if ENV['LEGACY_FIREFOX']
     browser = Capybara::Selenium::Driver.new(TestApp, options ).browser
     expect(true).to eq(true)
   end

spec/selenium_spec_firefox.rb

@@ -1,68 +0,0 @@
-# frozen_string_literal: true
-require 'spec_helper'
-require "selenium-webdriver"
-require 'shared_selenium_session'
-require 'rspec/shared_spec_matchers'
-
-Capybara.register_driver :selenium_firefox do |app|
-  Capybara::Selenium::Driver.new(
-    app,
-    browser: :firefox,
-    desired_capabilities: Selenium::WebDriver::Remote::Capabilities.firefox(marionette: false)
-  )
-end
-
-Capybara.register_driver :selenium_firefox_cant_clear_storage do |app|
-  Capybara::Selenium::Driver.new(
-    app,
-    browser: :firefox,
-    desired_capabilities: Selenium::WebDriver::Remote::Capabilities.firefox(marionette: false),
-    clear_local_storage: true,
-    clear_session_storage: true
-  )
-end
-
-module TestSessions
-  Selenium = Capybara::Session.new(:selenium_firefox, TestApp)
-end
-
-skipped_tests = [
-  :response_headers,
-  :status_code,
-  :trigger
-]
-skipped_tests << :windows if ENV['TRAVIS'] && ENV['SKIP_WINDOW']
-
-Capybara::SpecHelper.run_specs TestSessions::Selenium, "selenium", capybara_skip: skipped_tests
-
-RSpec.describe "Capybara::Session with legacy firefox" do
-  include Capybara::SpecHelper
-  include_examples  "Capybara::Session", TestSessions::Selenium, :selenium_firefox
-  include_examples  Capybara::RSpecMatchers, TestSessions::Selenium, :selenium_firefox
-
-  context "storage" do
-    it "warns storage clearing isn't available" do
-      @session = Capybara::Session.new(:selenium_firefox_cant_clear_storage, TestApp)
-      expect_any_instance_of(Kernel).to receive(:warn).with('sessionStorage clear requested but is not available for this driver')
-      expect_any_instance_of(Kernel).to receive(:warn).with('localStorage clear requested but is not available for this driver')
-      @session.visit('/')
-      @session.reset!
-    end
-  end
-end
-
-RSpec.describe Capybara::Selenium::Driver do
-  before do
-    @driver = Capybara::Selenium::Driver.new(TestApp, browser: :firefox, desired_capabilities: Selenium::WebDriver::Remote::Capabilities.firefox(marionette: false))
-  end
-
-  describe '#quit' do
-    it "should reset browser when quit" do
-      expect(@driver.browser).to be
-      @driver.quit
-      #access instance variable directly so we don't create a new browser instance
-      expect(@driver.instance_variable_get(:@browser)).to be_nil
-    end
-  end
-end
-

spec/shared_selenium_session.rb

@@ -35,7 +35,6 @@ RSpec.shared_examples "Capybara::Session" do |session, mode|
         @current_dir = Dir.getwd
         Dir.chdir(File.join(File.dirname(__FILE__), '..'))
         @env = { 'SELENIUM_BROWSER' => @session.driver.options[:browser].to_s }
-        @env['LEGACY_FIREFOX'] = 'TRUE' if mode == :selenium_firefox
       end
 
       after do