chore(build): remove yarn.lock (#2490)
chore(build): remove yarn.lock (#2490)

The Angular version specified in `yarn.lock` is `2.1.1` whereas in `package.json` Angular `4.4.6` is being used.

That's why I consider this file is outdated and not used.
fabric8-ui/fabric8-ui,fabric8io/fabric8-ui,fabric8-ui/fabric8-ui,fabric8-ui/fabric8-ui,fabric8io/fabric8-ui,fabric8-ui/fabric8-ui,fabric8io/fabric8-ui,fabric8io/fabric8-ui,fabric8-ui/fabric8-ui,fabric8io/fabric8-ui