What problems was I solving

The @architect/codecs package exported a UrlString codec that converted URL strings to URL instances, but no code in the monorepo imported or used it. Keeping dead exports in the package barrel creates unnecessary API surface and invites confusion with the similar, still-active HttpUrlString codec.

What user-facing changes did I ship

None. This is an internal package cleanup with no effect on user-facing behavior, APIs, or persisted data.

How I implemented it

Deleted architect/codecs/main/url-string.ts and removed export * from './url-string'; from architect/codecs/main/index.ts. A full-repo search confirmed no call sites, imports, or tests referenced the removed UrlString symbol.

Description for the changelog

Removed the unused UrlString codec from @architect/codecs. The codec was exported from the package barrel but had no consumers across the monorepo; the related HttpUrlString codec remains available.