Delete unnecessary files in `mrbgems/mruby-errno`
This is because it has been integrated into the mruby repository.
DELETE
mrbgems/mruby-errno/.gitignore
-/tmp

DELETE
mrbgems/mruby-errno/.travis.yml
-script:
- - "ruby run_test.rb all test"

DELETE
mrbgems/mruby-errno/run_test.rb
-#!/usr/bin/env ruby
-#
-# mrbgems test runner
-#
-
-gemname = File.basename(File.dirname(File.expand_path __FILE__))
-
-if __FILE__ == $0
- repository, dir = 'https://github.com/mruby/mruby.git', 'tmp/mruby'
- build_args = ARGV
- build_args = ['all', 'test'] if build_args.nil? or build_args.empty?
-
- Dir.mkdir 'tmp' unless File.exist?('tmp')
- unless File.exist?(dir)
- system "git clone #{repository} #{dir}"
- end
-
- exit system(%Q[cd #{dir}; MRUBY_CONFIG=#{File.expand_path __FILE__} ruby minirake #{build_args.join(' ')}])
-end
-
-MRuby::Build.new do |conf|
- toolchain :gcc
- conf.gembox 'default'
-
- conf.gem File.expand_path(File.dirname(__FILE__))
-end

Delete unnecessary files in `mrbgems/mruby-errno`

This is because it has been integrated into the mruby repository.