Re-licence statistics.py under the standard Python licence.

Lib/statistics.py

-##  Module statistics.py
-##
-##  Copyright (c) 2013 Steven D'Aprano <steve+python@pearwood.info>.
-##
-##  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.
-
-
 """
 Basic statistics module.