What problems was I solving

The isValidUrl boolean wrapper in the Management UI shared URL-validation helpers had become dead code. Its only known production consumer (url-field.tsx) was removed earlier, leaving an unused export and a dedicated test block that no longer provided meaningful coverage.

What user-facing changes did I ship

No user-facing changes. The public behavior of URL validation and normalization used throughout the Management UI remains unchanged.

How I implemented it

Deleted the one-line isValidUrl wrapper from validateUrl.ts and removed the corresponding isValidUrl test describe block from validateUrl.test.ts. Existing validateUrl and normalizeUrl exports and tests were left untouched, and a repo-wide search confirmed there are no remaining references to isValidUrl.

Description for the changelog

Removed the unused isValidUrl helper and its test block from the Management UI shared URL-validation helpers. Core validateUrl and normalizeUrl behavior is unchanged.