chore: remove unused CURRENCY_TO_COUNTRY dict from RemitlyScraper

[devin-ai-integration]

chore: remove unused CURRENCY_TO_COUNTRY dict from RemitlyScraper

Summary

Removes the CURRENCY_TO_COUNTRY class attribute (formerly lines 29–39) from RemitlyScraper in scrapers/remitly.py. This dict mapped currency codes to ISO-3166 country codes but was never referenced by any method in the class — _get_estimate() passes currency codes directly to the Remitly API params, and _scrape_landing_page() builds URLs from currency codes directly. A repo-wide grep confirms zero references beyond the definition itself.

The dict was added speculatively during initial code generation and was dead on arrival. (Note: the analogous CURRENCY_TO_ISO2 dict in westernunion.py is actively used, confirming this was intended but never wired up.)

Review & Testing Checklist for Human

• Verify no dynamic access to CURRENCY_TO_COUNTRY exists (e.g. via getattr(self, ...) or cls.__dict__ patterns) that a simple grep would miss
• Confirm the scraper still works end-to-end by running a test quote through RemitlyScraper.get_quote() for at least one currency pair

Notes

• Candidate ID: d92dff9dc72c
• Requested by: bot_apk
• Devin Session

[devin-ai-integration]

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