OpenSSL: Remove SSL_{CTX_,}_clear_options ifdefs

OpenSSL: Remove SSL_{CTX_,}_clear_options ifdefs

This simplifies the implementation since the SSL_clear_options() and
SSL_CTX_clear_options() are available in all supported versions of
OpenSSL. These were previously needed with older (now obsolete) versions
of OpenSSL, but the ifdefs were missed when removing the more explicit
version macro based backwards compatibility sections.

In practice, this reverts commit
d53d2596e4919bc2f7b6acfa6a9a9baba1d68360.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>