CORD-2648 remove unnecessary custom_type import

Change-Id: I91e4419919e186d8181ac1ca7955585fa394c429
diff --git a/templates/vnaasglobal-service-reference.yaml.j2 b/templates/vnaasglobal-service-reference.yaml.j2
index 25626a7..1fbf3d9 100644
--- a/templates/vnaasglobal-service-reference.yaml.j2
+++ b/templates/vnaasglobal-service-reference.yaml.j2
@@ -17,7 +17,6 @@
 tosca_definitions_version: tosca_simple_yaml_1_0
 
 imports:
-   - custom_types/xos.yaml
    - custom_types/vnaas.yaml
 
 description: vnaasglobal services, generated by platform-install