Remove dead facebook source (#1727)

[PontusLindblom]

The Meta CT API has been discontinued.

Closes #1727

Proposed changes

Remove all code related to Facebook, as the source is officially discontinued.

Proof

See images for results before and after the change.

-ls before

-ls after

-s facebook before

-s facebook after

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Summary by CodeRabbit

• Chores
  • Removed the Facebook source from the application's available data sources and initialization configuration. This data source is no longer available for selection during runtime. Related test files and expectations have been updated accordingly.

[coderabbitai]

Walkthrough

This change removes the Facebook source from subfinder's passive reconnaissance sources. The Facebook Certificate Transparency API has been discontinued by Meta, making the source non-functional. All related implementation files, imports, registry entries, tests, and type definitions are deleted.

Changes

Cohort / File(s)	Summary
Source Registry pkg/passive/sources.go, pkg/passive/sources_test.go	Removed Facebook source import and its entry from the AllSources, DefaultSources, and DefaultRecursiveSources lists. Test expectations updated to reflect the removal.
Facebook Source Implementation pkg/subscraping/sources/facebook/ctlogs.go, pkg/subscraping/sources/facebook/ctlogs_test.go, pkg/subscraping/sources/facebook/types.go	Removed entire Facebook CT logs source implementation including the apiKey and Source types with all associated methods (Run, Name, IsDefault, HasRecursiveSupport, KeyRequirement, NeedsKey, AddApiKeys, Statistics). Deleted all type definitions for API response parsing and the corresponding integration test.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 Farewell, Facebook, you've had your day,
Your CT logs have gone away,
Meta discontinued, we must move on,
Your source code vanishes at dawn!
Five files deleted, clean and clear,
Subfinder marches forward here! 🎉

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Remove dead facebook source (#1727)' clearly and concisely describes the main change of removing the Facebook source from the codebase, matching the changeset contents.
Linked Issues check	✅ Passed	The PR successfully fulfills issue #1727 requirements by completely removing all Facebook source code (ctlogs.go, types.go, tests) and its references from the sources list and test expectations.
Out of Scope Changes check	✅ Passed	All changes in the PR are directly related to removing the Facebook source; no unrelated modifications or out-of-scope changes are present.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[dogancanbakir]

Hi, thanks for your interest in contributing! Just a heads up, we ask contributors to work on 1 active issue at a time (see).

Also, we welcome AI-assisted development, but submissions must be complete, tested, and ready to merge. Please also make sure to fill out the PR template with proof that your changes work.

We're closing this PR along with your other open submissions. Once you're ready, feel free to pick one issue to focus on and resubmit; we'd be happy to review it.

Appreciate your understanding!

[PontusLindblom]

Hi @dogancanbakir,
I'm sorry that I opened two PRs (this and Chore - Update workflow dependencies) at the same time. I thought they were reasonably simple, non-related changes that could be solved at the same time.

If possible, could you please reopen this PR? My changes are 100% manual (no AI), and I put considerable effort into making this a clean PR for you to review.

[dogancanbakir]

Sorry about that — this was closed by mistake. Reopened!