PRODENG-935: clean up dead SENTRY_FRONTEND_REQUESTS_DSN (#109239)

originally removed years ago in
#34653 and
#34695

Author: mwarkentin

src/sentry/conf/server.py

@@ -1437,8 +1437,6 @@ def custom_parameter_sort(parameter: dict) -> tuple[str, int]:
 # DSN for the frontend to use explicitly, which takes priority
 # over SENTRY_FRONTEND_PROJECT or SENTRY_PROJECT
 SENTRY_FRONTEND_DSN: str | None = None
-# DSN for tracking all client HTTP requests (which can be noisy) [experimental]
-SENTRY_FRONTEND_REQUESTS_DSN: str | None = None
 
 # Configuration for the JavaScript SDK's allowUrls option - defaults to ALLOWED_HOSTS
 SENTRY_FRONTEND_WHITELIST_URLS: list[str] | None = None