message: Remove unused prod dependency
diff: "dependencies": {
  "@backstage/config": "^0.1.2",
  "@backstage/core": "^0.4.3",
  - "@backstage/test-utils": "^0.1.5",
  "@backstage/theme": "^0.2.2",
  "@material-ui/core": "^4.11.0",
  "@material-ui/icons": "^4.9.1",
  