fix build fail

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 421e45d..1697124 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -26,7 +26,6 @@
 #include "ssl_misc.h"
 #include "ssl_tls13_keys.h"
 #include "ssl_debug_helpers.h"
-#include "ecdh_misc.h"
 
 #if defined(MBEDTLS_ECP_C)
 #include "mbedtls/ecp.h"