Remove bundle audit tests

Gemfile

@@ -95,7 +95,6 @@ group :test do
     # selenium-webdriver 3.x is incompatible with Firefox version 48 and prior
     gem 'selenium'
     gem 'selenium-webdriver', '~> 2.53.4'
-    gem 'bundler-audit'
     # nokogirl is needed by capybara which may require one of the below commands
     # sudo apt-get install libxslt-dev libxml2-dev
     # sudo port install libxml2 libxslt

Rakefile

@@ -61,34 +61,6 @@ task :rest_test do
   Rake::Task['beef_stop'].invoke
 end
 
-################################
-# run bundle-audit
-
-namespace :bundle_audit do
-  require 'bundler/audit/cli'
-
-  desc 'Update bundle-audit database'
-  task :update do
-    Bundler::Audit::CLI.new.update
-  end
-
-  desc 'Check gems for vulns using bundle-audit'
-  task :check do
-    Bundler::Audit::CLI.new.check
-  end
-
-  desc 'Update vulns database and check gems using bundle-audit'
-  task :run do
-    Rake::Task['bundle_audit:update'].invoke
-    Rake::Task['bundle_audit:check'].invoke
-  end
-end
-
-desc "Run bundle-audit"
-task :bundle_audit do
-  Rake::Task['bundle_audit:run'].invoke
-end
-
 ################################
 # SSL/TLS certificate