Fix: remove duplication babel-presets

Author: RyanCCollins

package.json

@@ -83,7 +83,7 @@
     "babel-core": "^6.3.15",
     "babel-loader": "^6.2.0",
     "babel-polyfill": "latest",
-    "babel-preset-es2015": "^6.3.13",
+    "babel-preset-es2015": "^6.9.0",
     "babel-preset-react": "^6.3.13",
     "babel-preset-stage-0": "^6.3.13",
     "components": "^0.1.0",
@@ -128,7 +128,6 @@
     "babel-eslint": "^5.0.0-beta4",
     "babel-jest": "^15.0.0",
     "babel-plugin-webpack-loaders": "^0.7.1",
-    "babel-preset-es2015": "^6.9.0",
     "cross-env": "^2.0.0",
     "enzyme": "^2.4.1",
     "enzyme-to-json": "^1.0.3",