gfe-relnote: n/a. Remove obsolete comment from test. Follow-up to cl/309254981 and cl/309297734. Test is known to work in Chromium since it been enabled with TLS at https://quiche.googlesource.com/quiche.git/+/b5a07a10762d9200b3185ae3e8a3f1038811258e and rolled into Chromium at https://crrev.com/c/2174355. PiperOrigin-RevId: 309398189 Change-Id: I77ad07978a4b1d1f374f30765253543d0ae01fe7