rem: dev: Remove unused <openssl/hmac.h> headers from OpenSSL shims

The <openssl/hmac.h> header was unused and including the header might cause build failure when OpenSSL doesn't have Engines support enabled.

See https://fedoraproject.org/wiki/Changes/OpensslDeprecateEngine

Removes unused hmac includes after Remove OpenSSL Engine support (commit ef7aba70) removed engine support.