Merge pull request #22 from activeadmin-plugins/Fivell-patch-2

remove obsolete section from readme

Author: Fivell

README.md

@@ -74,12 +74,6 @@ ActiveAdminDatetimepicker::Base.format = "%d/%m/%Y %H:%M" # Ruby format
 See [the datetimepicker documentation for more details](http://xdsoft.net/jqplugins/datetimepicker/).
 
 
-## Development
-
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `bin/console` for an interactive prompt that will allow you to experiment.
-
-To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release` to create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
-
 ## Contributing
 
 1. Fork it ( https://github.com/activeadmin-plugins/activeadmin_datetimepicker/fork )