Remove unavailable link from docs/testing-frameworks (#4652)
Remove unavailable link from docs/testing-frameworks (#4652)

The Web Components example is pointing to a Stack Overflow Documentation page, a service that was discontinued.
Ideally a new resource should be added, but I don't have any suggestions.
facebook/jest,bookman25/jest,bookman25/jest,ide/jest,bookman25/jest,cpojer/jest,facebook/jest,ide/jest,facebook/jest,ide/jest,cpojer/jest,cpojer/jest