Removed unnecessary files from `mruby-sleep`;
DELETE
mrbgems/mruby-sleep/.gitignore
-/mruby
-
-*.so
-*.a
\ No newline at end of file

DELETE
mrbgems/mruby-sleep/.travis.yml
-dist: trusty
-
-language: c
-compiler:
- - gcc
- - clang
-env:
- - MRUBY_VERSION=1.2.0
- - MRUBY_VERSION=master
-matrix:
- allow_failures:
- - env: MRUBY_VERSION=master
-branches:
- only:
- - master
-addons:
- apt:
- packages:
- - rake
- - bison
- - git
- - gperf
- # - aclocal
- # - automake
- # - autoconf
- # - autotools-dev
-
-script:
- - rake test
\ No newline at end of file

DELETE
mrbgems/mruby-sleep/.travis_build_config.rb
-MRuby::Build.new do |conf|
- toolchain :gcc
- conf.gembox 'default'
- conf.gem '../mruby-sleep'
- conf.enable_test
-end

Removed unnecessary files from `mruby-sleep`; #4702