Remove non-existent heartbeatIntervalMs option from docs

[phryneas]

This came up in #8167

[apollo-librarian]

✅ Docs preview ready

The preview is ready to be viewed. View the preview

File Changes

0 new, 1 changed, 0 removed

* (developer-tools)/apollo-server/(latest)/api/plugin/subscription-callback.mdx

Build ID: 853829c52f5915483b0c6479
Build Logs: View logs

URL: https://www.apollographql.com/docs/deploy-preview/853829c52f5915483b0c6479

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[mario-jerkovic]

@phryneas cc: @bnjjj shouldn't this removed property from the ApolloServerPluginSubscriptionCallback docs be replace with maxConsecutiveHeartbeatFailures, this one isn't documented at all.

[phryneas]

@mario-jerkovic I have to admit, I'm not very familiar with the history here, but looking at #7793, it seems this was removed independently and maxConsecutiveHeartbeatFailures wasn't added as an immediate alternative/workaround.

I do agree that maxConsecutiveHeartbeatFailures should probably be documented, but someone else with more domain knowledge would have to do that. I'm just trying to at least get incorrect information out of the docs with this PR.