Remove BORINGSSL_API_VERSION checks from quic code These checks are no longer necessary, because BoringSSL in google3 (and chromium) has been updated past https://boringssl-review.googlesource.com/c/boringssl/+/42304 which introduced the need for these checks. PiperOrigin-RevId: 332568497 Change-Id: I385fae31c994b1de943ab60bff6f37d5b9ffd6a1