message: remove plugin-catalog dep
diff: "dependencies": {
  "@backstage/catalog-model": "^0.2.0",
  "@backstage/core": "^0.3.0",
  - "@backstage/plugin-catalog": "^0.2.1",
  "@backstage/test-utils": "^0.1.2",
  "@backstage/theme": "^0.2.1",
  "@material-ui/core": "^4.11.0",
  "@material-ui/icons": "^4.9.1",
  "@material-ui/lab": "4.0.0-alpha.45",
  + "classnames": "^2.2.6",
  "date-fns": "^2.16.1",
  "react": "^16.13.1",
  "react-dom": "^16.13.1",
  + "react-router-dom": "6.0.0-beta.0",
  "react-use": "^15.3.3"
  },
  "devDependencies": {
  