evp_extra_test2: Remove TODO 3.0
evp_extra_test2: Remove TODO 3.0

The TODO marks optional cleanup that can be done any time in future.

Reviewed-by: Paul Dale <ddec78389666b4f7c9b4d110380c848489a3e4aa@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14367)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl