docs: remove teams Slack mention from README

[TabishB]

Summary

• Remove the Teams section that mentioned Slack channel access from the README

Testing

• Verified README no longer contains Slack, teams@openspec, or the Teams heading

Summary by CodeRabbit

• Documentation
  • Removed the Teams section and team access call-to-action from README.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 71d84351-856f-4609-ae02-3a1142e60d86

📥 Commits

Reviewing files that changed from the base of the PR and between f529b25 and c4d5be8.

📒 Files selected for processing (1)

• README.md

💤 Files with no reviewable changes (1)

• README.md

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📝 Walkthrough

Walkthrough

Removed the "Teams" section from README.md, including the Slack/team access call-to-action and associated email link. This simplifies the documentation by eliminating team-related contact information.

Changes

Cohort / File(s)	Summary
Documentation README.md	Removed the "Teams" section containing Slack/team access call-to-action and email link (4 lines deleted).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A section removed with care and grace,
The Teams call fades without a trace.
Simpler docs, cleaner sight,
README's now just right! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: removing the Teams/Slack section from the README documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/remove-readme-slack-mention

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[alfred-openspec]

Looks good, clean docs-only removal.