remove gitbook

package.json

@@ -11,11 +11,7 @@
     "prepublish": "npm run build && npm run build:umd && npm run build:umd:min",
     "build:umd": "browserify lib/index.js -o dist/recycle.js -s recycle && echo \"recycle = recycle.default;\" >> dist/recycle.js",
     "build:umd:min": "NODE_ENV=production uglifyjs --compress --mangle -o dist/recycle.min.js -- dist/recycle.js",
-    "build": "npm run clean && babel src -d ./lib/",
-    "docs:prepare": "gitbook install",
-    "docs:watch": "npm run docs:prepare && gitbook serve",
-    "docs:build": "npm run docs:prepare && rm -rf _book && gitbook build",
-    "docs:publish": "npm run docs:build && cd _book && git init && git commit --allow-empty -m 'Update docs' && git checkout -b gh-pages && git add . && git commit -am 'Update docs' && git push https://github.com/recyclejs/recycle gh-pages --force && git checkout master"
+    "build": "npm run clean && babel src -d ./lib/"
   },
   "jest": {
     "testMatch": [