Remove unused react-composer dependency

Author: jamesplease

package.json

@@ -5,7 +5,6 @@
   "dependencies": {
     "lodash": "^4.17.4",
     "react": "^16.0.0",
-    "react-composer": "^2.1.0",
     "react-dom": "^16.0.0",
     "react-redux": "^5.0.5",
     "react-redux-resource": "0.0.1",