remove ms_teams

[nsano-rururu]

Description

Checklist

• I have reviewed the contributing guidelines.
• I have included unit tests for my changes or additions.
• I have successfully run make test-docker with my changes.
• I have manually tested all relevant modes of the change in this PR.
• I have updated the documentation.
• I have updated the changelog.

Questions or Comments

[Copilot]

Pull request overview

Removes the built-in Microsoft Teams (ms_teams) alerter from ElastAlert 2, including its implementation, schema entries, tests, and user-facing documentation references.

Changes:

• Deleted the MsTeamsAlerter implementation and its unit tests.
• Removed ms_teams from rule loading/alert type mapping and from the rule schema.
• Updated docs to no longer list/document Microsoft Teams as a supported alert type.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/alerters/teams_test.py	Removes unit tests for the MS Teams alerter.
elastalert/schema.yaml	Drops MS Teams-specific schema definitions and rule properties.
elastalert/loaders.py	Removes ms_teams from the built-in alerts_mapping.
elastalert/alerters/teams.py	Deletes the MS Teams alerter implementation.
docs/source/elastalert.rst	Removes Microsoft Teams from the supported alert types list.
docs/source/alerts.rst	Removes ms_teams from alert type lists and deletes the MS Teams documentation section.

Comments suppressed due to low confidence (2)

docs/source/elastalert.rst:60

• This PR removes built-in Microsoft Teams alerting, which is a breaking change for existing ms_teams rules. The alert-type list has been updated here, but the CHANGELOG still contains MS Teams entries and doesn’t note the removal; please add a Breaking Changes entry describing the removal and the recommended replacement (e.g., ms_power_automate).

- LINE Messaging API
- Matrix Hookshot
- Mattermost
- Microsoft Power Automate
- OpsGenie
- PagerDuty
- PagerTree

docs/source/alerts.rst:1638

• With the Microsoft Teams section removed, readers landing in this area of the alerts docs won’t see an explanation of what happened to the ms_teams alert type. Consider adding a short note (near this transition) that ms_teams has been removed and point to the supported alternative (ms_power_automate) to reduce confusion for users upgrading.

Microsoft Power Automate
~~~~~~~~~~~~~~~~~~~~~~~~

Microsoft Power Automate alerter will send a notification to a predefined Microsoft Teams channel.

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[Copilot]

Removing the ms_teams entry from alerts_mapping means existing rules will now fall back to get_module('ms_teams'), which will likely fail with an ImportError-style message that doesn’t clearly explain that the built-in MS Teams alerter was removed. Consider adding an explicit guard (e.g., special-casing ms_teams in create_alert) to raise an EAException with a clear migration hint (like using ms_power_automate).

[nsano-rururu]

There was an outdated alerter remaining, and I had previously received inquiries about it not working, so I advised using the newer alerter. Therefore, I will be deleting it.

[jertel]

Thanks for removing it. The EOL has been extended through end of this month, but I see no reason to wait.