Remove upgrade script

When using the mono repo each module had to check its own dependencies
for upgrades. We have replaced this with Renovate. So this script can be
removed.

Author: mpkorstanje

package.json

@@ -49,7 +49,6 @@
     "cucumber-http": "cucumber-js --profile http",
     "cucumber-dom": "cucumber-electron --profile dom --stylesheet features/src/components/style.css ",
     "cucumber-dom-http": "cucumber-electron --profile domHttp --stylesheet features/src/components/style.css",
-    "upgrade": "npm-check-updates --upgrade",
     "eslint": "eslint --ext ts,tsx --max-warnings 0 src features",
     "eslint-fix": "eslint --ext ts,tsx --max-warnings 0 --fix src features",
     "pretty-quick": "pretty-quick --staged"