EVP_MD_CTX_ctrl(): Remove unnecessary control
EVP_MD_CTX_ctrl(): Remove unnecessary control

A check was present as to what operation is performed with this
context.  It may have been useful at some point, but isn't any more.

Reviewed-by: Shane Lontis <452ce16516ceed26291fe7de3f8b53540d83864e@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/10947)

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