Remove deprecated iij stuffs
MODIFY
mrbgems/mruby-io/README.md
mrbgems/mruby-io/README.md
mruby-io
========
-[![Build Status](https://travis-ci.org/iij/mruby-io.svg?branch=master)](https://travis-ci.org/iij/mruby-io)
-
`IO` and `File` classes for mruby
@@ -9,7 +7,7 @@ mruby-io
Add the line below to your `build_config.rb`:
```
- conf.gem :github => 'iij/mruby-io'
+ conf.gem core: 'mruby-io'
```
## Implemented methods

Remove deprecated iij stuffs