Remove deprecated series metadata and tests

Change-Id: Ie0d3f6a7905aa4005aa3bd97209e6c9c02173c2c

src/metadata.yaml

@@ -15,7 +15,6 @@ series:
   - trusty
   - xenial
   - zesty
-  - yakkety
 subordinate: false
 provides:
   dns-backend:

src/tests/gate-basic-yakkety-newton

@@ -1,23 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2016 Canonical Ltd
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#  http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Amulet tests on a basic designate-bind deployment on yakkety-newton."""
-
-from basic_deployment import DesignateBindDeployment
-
-if __name__ == '__main__':
-    deployment = DesignateBindDeployment(series='yakkety')
-    deployment.run_tests()