Prevent react_ujs from depending on itself

Doesn't make any sense for a package to depend on itself

Author: erikt9

package.json

@@ -12,8 +12,5 @@
   },
   "devDependencies": {
     "webpack": "^2.3.3"
-  },
-  "dependencies": {
-    "react_ujs": "^2.6.1"
   }
 }