Remove copyright from empty file

Refer to following instruction:
http://docs.openstack.org/developer/hacking/#openstack-licensing

[H104] Files with no code shouldn't contain any license header nor comments,
and must be left completely empty.

Change-Id: I7daa4482201bb2bb62a6319c582dc804acc90053
Closes-Bug: #1262424

manila/openstack/__init__.py

@@ -1,13 +0,0 @@
-# Copyright (c) 2011 Red Hat, Inc.
-#
-#    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.