General: Host name was formed from obsolete code

openpype/lib/avalon_context.py

@@ -952,7 +952,7 @@ def get_build_presets(self, task_name, asset_doc):
         Returns:
             (dict): preset per entered task name
         """
-        host_name = avalon.api.registered_host().__name__.rsplit(".", 1)[-1]
+        host_name = os.environ["AVALON_APP"]
         project_settings = get_project_settings(
             avalon.io.Session["AVALON_PROJECT"]
         )