Drop 2016.3 tests

Change-Id: I0d232b93c0785c1e5a5af79a6c9cc06b0df241d3
Related-PROD: PROD-27065 (PROD:27065)
diff --git a/.kitchen.yml b/.kitchen.yml
index b0ab87c..20c7df1 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -48,11 +48,6 @@
   - &xenial-stable <%=ENV['IMAGE_XENIAL_STABLE'] || 'docker-dev-local.docker.mirantis.net/epcim/salt/saltstack-ubuntu-xenial-salt-stable/salt:2018_11_19'%>
 
 platforms:
-  - name: xenial-2016.3
-    driver_config:
-      image: *xenial-20163
-      platform: ubuntu
-
   - name: xenial-2017.7
     driver_config:
       image: *xenial-20177