Unmark heat tests as smoke

Tests which marked as smoke at the moment should be
removed because they unstable.

Closes-Issue: PROD-21613
Change-Id: I6ecb877939473ef34cd0df2c1c430a75d5623411
diff --git a/heat_tempest_plugin/tests/scenario/test_server_signal.py b/heat_tempest_plugin/tests/scenario/test_server_signal.py
index 8fc6758..1823087 100644
--- a/heat_tempest_plugin/tests/scenario/test_server_signal.py
+++ b/heat_tempest_plugin/tests/scenario/test_server_signal.py
@@ -78,7 +78,6 @@
             self.fail(
                 "Timed out waiting for %s to become reachable" % server_ip)
 
-    @decorators.attr(type='smoke')
     @decorators.idempotent_id('8da0f6cc-60e6-4298-9e54-e1f905c5552a')
     def test_server_signal_userdata_format_raw(self):
         self._test_server_signal(image=self.conf.minimal_image_ref,