Remove unnecessary devDependency

Author: fritz-c

package.json

@@ -45,7 +45,6 @@
     "babel-plugin-transform-object-rest-spread": "^6.8.0",
     "babel-preset-es2015": "^6.9.0",
     "babel-preset-react": "^6.11.1",
-    "babel-register": "^6.9.0",
     "cross-env": "^2.0.0",
     "css-loader": "^0.23.1",
     "eslint": "^2.9.0",