Remove simplecov

Gemfile

@@ -6,5 +6,4 @@ unless ENV['TRAVIS']
   gem 'yard',   require: false
 end
 
-gem 'simplecov', '~> 0.11', require: false
-gem 'coveralls',            require: false
+gem 'coveralls', require: false

Rakefile

@@ -9,7 +9,7 @@ end
 
 namespace :test do
   task :coverage do
-    ENV['COVERAGE'] = 'true'
+    ENV['COVERALL'] = 'true'
     Rake::Task['test'].invoke
   end
 end

test/test_helper.rb

@@ -1,19 +1,9 @@
 require 'rubygems'
 require 'bundler/setup'
 
-if ENV['COVERAGE'] == 'true'
-  require 'simplecov'
+if ENV['COVERALL']
   require 'coveralls'
-
-  SimpleCov.formatters = [
-    SimpleCov::Formatter::HTMLFormatter,
-    Coveralls::SimpleCov::Formatter
-  ]
-
-  SimpleCov.start do
-    command_name 'test'
-    add_filter   'test'
-  end
+  Coveralls.wear!
 end
 
 TEST_ENCODINGS = Encoding.name_list.each_with_object(['UTF-8']) do |encoding, result|