[nrf noup] include: net: socket_ncs: remove leftover

nrf-squash! [nrf noup] include: net: add NCS extensions

Removes leftover socket options `TLS_SESSION_CACHE_DISABLED`
and `TLS_SESSION_CACHE_ENABLED`. These exist already
in `socket.h`.

Signed-off-by: Mirko Covizzi <[email protected]>

Author: MirkoCovizzi

include/zephyr/net/socket_ncs.h

@@ -49,10 +49,6 @@ extern "C" {
  */
 #define TLS_DTLS_HANDSHAKE_STATUS 21
 
-/* Valid values for TLS_SESSION_CACHE option */
-#define TLS_SESSION_CACHE_DISABLED 0 /**< Disable TLS session caching. */
-#define TLS_SESSION_CACHE_ENABLED 1 /**< Enable TLS session caching. */
-
 /* Valid values for TLS_DTLS_HANDSHAKE_TIMEO option */
 #define TLS_DTLS_HANDSHAKE_TIMEO_NONE 0 /**< No timeout */
 #define TLS_DTLS_HANDSHAKE_TIMEO_1S 1 /**< 1 second */