Remove some tls_ver < MBEDTLS_SSL_VERSION_TLS1_2 checks

mbedtls no longer supports earlier TLS protocol versions

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index 49cda3f..9e3e736 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -951,7 +951,7 @@
 static int ssl_pick_cert( mbedtls_ssl_context *ssl,
                           const mbedtls_ssl_ciphersuite_t * ciphersuite_info )
 {
-    mbedtls_ssl_key_cert *cur, *list, *fallback = NULL;
+    mbedtls_ssl_key_cert *cur, *list;
     mbedtls_pk_type_t pk_alg =
         mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
     uint32_t flags;
@@ -1015,9 +1015,6 @@
         break;
     }
 
-    if( cur == NULL )
-        cur = fallback;
-
     /* Do not update ssl->handshake->key_cert unless there is a match */
     if( cur != NULL )
     {