refactor: remove dead code

[andrewrobinsonhodges-snyk]

Description

Provide description of this PR and changes, if linked Jira ticket doesn't cover it in full.

Checklist

• Tests added and all succeed
• Regenerated mocks, etc. (make generate)
• Linted (make lint-fix)
• README.md updated, if user-facing
• License file updated, if new 3rd-party dependency is introduced

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

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[snyk-pr-review-bot]

PR Reviewer Guide 🔍

🧪 No relevant tests

🔒 No security concerns identified

⚡ No major issues detected

📚 Repository Context Analyzed This review considered 10 relevant code sections from 5 files (average relevance: 0.92) application/server/configuration.go (5 segments, lines 713-880) application/config/config.go (2 segments, lines 1-196) domain/ide/command/ldx_sync_service.go (lines 399-489) domain/ide/command/apply_auth_config.go (lines 1-64) domain/ide/command/toggle_tree_filter.go (lines 1-114)