Remove unused babel plugin.

.babelrc

@@ -4,7 +4,6 @@
     "react"
   ],
   "plugins": [
-    "transform-es2015-destructuring",
     "transform-object-rest-spread"
   ]
 }

package.json

@@ -28,7 +28,6 @@
     "babel-core": "^6.23.1",
     "babel-eslint": "^7.1.1",
     "babel-loader": "^7.0.0",
-    "babel-plugin-transform-es2015-destructuring": "^6.23.0",
     "babel-plugin-transform-object-rest-spread": "^6.22.0",
     "babel-preset-es2015": "^6.22.0",
     "babel-preset-react": "^6.22.0",