Removed babel-plugin-syntax-dynamic-import as it's already included via stage-0 preset.

Removed babel-plugin-transform-react-constant-elements due to known issues (see facebook/create-react-app#553)

Author: JayCanuck

package.json

@@ -22,9 +22,7 @@
     "babel-eslint": "~8.0.1",
     "babel-loader": "~7.1.2",
     "babel-plugin-dev-expression": "~0.2.1",
-    "babel-plugin-syntax-dynamic-import": "~6.18.0",
     "babel-plugin-transform-es2015-modules-commonjs": "~6.26.0",
-    "babel-plugin-transform-react-constant-elements": "~6.23.0",
     "babel-plugin-transform-react-inline-elements": "~6.22.0",
     "babel-preset-es2015": "~6.24.1",
     "babel-preset-react": "~6.24.1",