Companion for #6610 (Balances Weight Trait) (#1425)

* Update for balances weights

* remove unneeded tests

* Add file headers

* cargo update -p sp-io

polkadot/runtime/westend/src/weights/mod.rs

@@ -0,0 +1,19 @@
+// Copyright 2019-2020 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
+/// A collection of weight modules used for pallets in the runtime.
+
+pub mod balances;