# What this PR does
- removes unused "custom button" backend code now that we've migrated to
outgoing webhooks
- adds new e2e test for webhooks asserting that an `ngrok`/`express`
webhook handler receives the call as expected + payload is as expected
(related to https://github.com/grafana/oncall/issues/2691) - skipped for
now, the test passes locally but fails on GitHub Actions CI, seems to be
networking related
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
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Co-authored-by: Michael Derynck <michael.derynck@grafana.com>
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