Sean Oliver 571533482f refactor(growth): remove useTelemetryCookie and sb-telemetry-data cookie (#43840) ...

The `sb-telemetry-data` cookie and `useTelemetryCookie` hook are fully
superseded by the `_sb_first_referrer` edge cookie (GROWTH-625) and the
in-memory first-touch store (GROWTH-656). GROWTH-656 already removed the
`useTelemetryCookie` call from `PageTelemetry` — this PR cleans up the
rest.

**Changes**
- Delete `useTelemetryCookie.tsx` hook
- Remove `clearTelemetryDataCookie` from `telemetry-utils.ts` (and its
`TELEMETRY_DATA` dep)
- Remove the `clearTelemetryDataCookie` call from `consent.tsx` (the
cookie is never written anymore, so clearing it on deny is a no-op)
- Remove `TELEMETRY_DATA` key from `LOCAL_STORAGE_KEYS`

**Testing**
Verified no remaining references to `useTelemetryCookie`,
`sb-telemetry-data`, `TELEMETRY_DATA`, or `clearTelemetryDataCookie` in
the codebase.

GROWTH-646

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Removed local telemetry data collection and cookie storage
functionality.
* Updated consent handling to remove associated telemetry cookie cleanup
operations.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

2026-04-15 23:51:01 +01:00

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