fix: conditional compilation issue

src/api/api.c

@@ -1539,13 +1539,7 @@ void _z_subscriber_drop(_z_subscriber_t *sub) { _z_undeclare_and_clear_subscribe
 _Z_OWNED_FUNCTIONS_VALUE_NO_COPY_IMPL(_z_subscriber_t, subscriber, _z_subscriber_check, _z_subscriber_null,
                                       _z_subscriber_drop)
 
-void z_subscriber_options_default(z_subscriber_options_t *options) {
-#if Z_FEATURE_UNSTABLE_API == 1
-    options->reliability = Z_RELIABILITY_DEFAULT;
-#else
-    options->__dummy = 0;
-#endif
-}
+void z_subscriber_options_default(z_subscriber_options_t *options) { options->__dummy = 0; }
 
 int8_t z_declare_subscriber(z_owned_subscriber_t *sub, const z_loaned_session_t *zs, const z_loaned_keyexpr_t *keyexpr,
                             z_moved_closure_sample_t *callback, const z_subscriber_options_t *options) {

src/session/push.c

@@ -21,11 +21,11 @@
 #include "zenoh-pico/session/subscription.h"
 #include "zenoh-pico/utils/logging.h"
 
+#if Z_FEATURE_SUBSCRIPTION == 1
 int8_t _z_trigger_push(_z_session_t *zn, _z_n_msg_push_t *push, z_reliability_t reliability) {
     int8_t ret = _Z_RES_OK;
 
     // TODO check body to know where to dispatch
-#if Z_FEATURE_SUBSCRIPTION == 1
 
     size_t kind = push->_body._is_put ? Z_SAMPLE_KIND_PUT : Z_SAMPLE_KIND_DELETE;
     if (push->_body._is_put) {
@@ -39,9 +39,13 @@ int8_t _z_trigger_push(_z_session_t *zn, _z_n_msg_push_t *push, z_reliability_t
         ret = _z_trigger_subscriptions(zn, push->_key, payload, &encoding, kind, &del->_commons._timestamp, push->_qos,
                                        del->_attachment, reliability);
     }
+    return ret;
+}
 #else
+int8_t _z_trigger_push(_z_session_t *zn, _z_n_msg_push_t *push, z_reliability_t reliability) {
     _ZP_UNUSED(zn);
     _ZP_UNUSED(push);
-#endif
-    return ret;
+    _ZP_UNUSED(reliability);
+    return _Z_RES_OK;
 }
+#endif