This slipped through, but all the callers are now using EVP_aead_chacha20_poly1305, so we can remove this version. Change-Id: I76eb3a4481aae4d18487ca96ebe3776e60d6abe8 Reviewed-on: https://boringssl-review.googlesource.com/7650 Reviewed-by: Steven Valdez <svaldez@google.com> Reviewed-by: David Benjamin <davidben@google.com>kris/onging/CECPQ3_patch15