statem_lib.c: Remove TODOs that are unnecessary
statem_lib.c: Remove TODOs that are unnecessary

If the EVP_MD_CTX_ctrl is deprecated the code will
generate deprecation warnings. So there is no point in marking
all EVP_MD_CTX_ctrl() calls with TODOs.

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