message: docs: remove unncessary links from create-plugin/README
diff: # create-kintone-plugin
  [![npm version](https://badge.fury.io/js/%40kintone%2Fcreate-plugin.svg)](https://badge.fury.io/js/%40kintone%2Fcreate-plugin)
  -[![CircleCI](https://circleci.com/gh/kintone/create-plugin.svg?style=shield)](https://circleci.com/gh/kintone/create-plugin)
  -[![Build Status](https://travis-ci.org/kintone/create-plugin.svg?branch=master)](https://travis-ci.org/kintone/create-plugin)
  A CLI tool for creating a kintone plugin!
  