remove unnecessary 'babel' dependency

fixes #6

Author: Andrew Schmadel

package.json

@@ -8,7 +8,6 @@
     "url": "https://github.com/schmod/babel-plugin-angularjs-annotate"
   },
   "dependencies": {
-    "babel": "^6.5.1",
     "babel-plugin-transform-es2015-function-name": "^6.9.0",
     "simple-is": "~0.2.0"
   },