serve: Remote TODO that will not be done

We shouldn't really provide the derived context keys. There isn't any use to them outside of that specific license request and license response for which it was derived from. The only use to them would be to allow the client to decrypt the keys manually, which wont be necessary nor secure.

pywidevine/serve.py

@@ -296,7 +296,6 @@ async def parse_license(request: web.Request) -> web.Response:
         "status": 200,
         "message": "Success",
         "data": {
-            # TODO: Add derived context keys like enc/mac[client]/mac[server]
             "keys": license_keys
         }
     })