Removed unused dep

Author: FlorianRappl

package-lock.json

@@ -28,8 +28,6 @@
     "lint": "tslint -c tslint.json 'src/**/*.{ts,tsx}' --project tsconfig.json",
     "prepush": "npm run test & npm run build",
     "prettier": "prettier --config prettier.config.js --write 'src/**/*.{ts,tsx}'",
-    "serve": "pushstate-server -d styleguide -p 6060",
-    "serve:test": "pushstate-server -d integration/styleguide -p 6065",
     "start": "styleguidist server",
     "test": "npm run lint && npm run test:unit",
     "test:unit": "cross-env NODE_ENV=test jest",
@@ -92,7 +90,6 @@
     "material-design-icons": "^3.0.1",
     "prettier": "^1.15.3",
     "puppeteer": "^1.13.0",
-    "pushstate-server": "^3.0.1",
     "react": "~16.8.0",
     "react-docgen-typescript": "^1.12.3",
     "react-dom": "^16.8.0",