Useless modules and misspellings (#2068)

runtime/parachains/src/configuration.rs

@@ -44,7 +44,7 @@ pub struct HostConfiguration<BlockNumber> {
 	pub max_code_size: u32,
 	/// The maximum head-data size, in bytes.
 	pub max_head_data_size: u32,
-	/// THe maximum POV block size, in bytes.
+	/// The maximum POV block size, in bytes.
 	pub max_pov_size: u32,
 	/// The amount of execution cores to dedicate to parathread execution.
 	pub parathread_cores: u32,

runtime/parachains/src/lib.rs

@@ -29,7 +29,6 @@ pub mod initializer;
 pub mod paras;
 pub mod scheduler;
 pub mod session_info;
-pub mod validity;
 pub mod origin;
 pub mod dmp;
 pub mod ump;

runtime/parachains/src/validity.rs

-// Copyright 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/>.