Remove unused react-test-renderer

Author: ryanbrainard

package-lock.json

@@ -71,7 +71,6 @@
     "prop-types": "^15.7.2",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
-    "react-test-renderer": "^16.8.6",
     "rimraf": "^2.3.4",
     "whatwg-fetch": "*"
   },