chore(translations): remove or blank unused strings

[Thalarion]

No description provided.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 2ca99fc2-0d20-4833-af2b-b846e0140d7d

📥 Commits

Reviewing files that changed from the base of the PR and between 1e27d5d and 6ebfb26.

⛔ Files ignored due to path filters (1)

• core/embed/rust/src/translations/generated/translated_string.rs is excluded by !**/generated/**

📒 Files selected for processing (4)

• core/embed/rust/librust_qstr.h
• core/mocks/trezortranslate_keys.pyi
• core/translations/blank_translations_rules.json
• core/translations/en.json

💤 Files with no reviewable changes (2)

• core/embed/rust/librust_qstr.h
• core/mocks/trezortranslate_keys.pyi

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Walkthrough

This PR removes four deprecated translation identifiers from MicroPython QSTR registration and translation stubs, adds two new coinjoin-related translation keys, and restructures English translation entries to support per-device text variants. The changes update blank translation rules to specify which keys are empty for specific device layouts (Bolt, Caesar, Delizia, Eckhart), converting 22 existing translation keys from single strings to variant objects with conditional text per device.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description contains only a template with no actual content describing the changes, rationale, testing, or PR setup instructions required by the template.	Replace the template placeholder with a substantive description of changes, commit progression, testing performed, and complete the required core-developer checklist items (assignment, project setup, status, QA notes if applicable).

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: removing or blanking unused translation strings, which aligns with the file modifications in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch thalarion/2605_remove_or_blank_unused_strings

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[github-actions]

en main(all)

model	device_test	click_test	persistence_test
T2T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)	test(all) main(all)

Latest CI run: 25923284223

[obrusvit]

I'm not sure about removing fido__ until we have proper UI tests in place.

Could it be a culprit of the recent bug with the FIDO button shown by @romanz ?