Remove hast dependency

Author: wooorm

package.json

@@ -24,7 +24,6 @@
   "devDependencies": {
     "browserify": "^13.0.0",
     "esmangle": "^1.0.0",
-    "hast": "0.0.2",
     "istanbul": "^0.4.0",
     "remark-cli": "^2.1.0",
     "remark-preset-wooorm": "^1.0.0",