Remove duplicate comments (#6638)

Author: kianenigma

src/mock.rs

@@ -25,8 +25,6 @@ use frame_support::{
 	traits::{OnInitialize, OnFinalize},
 };
 use sp_core::H256;
-// The testing primitives are very useful for avoiding having to work with signatures
-// or public keys. `u64` is used as the `AccountId` and no `Signature`s are required.
 use sp_runtime::{
 	Perbill, traits::{BlakeTwo256, IdentityLookup}, testing::Header,
 };
@@ -50,9 +48,6 @@ impl_outer_dispatch! {
 	}
 }
 
-// For testing the pallet, we construct most of a mock runtime. This means
-// first constructing a configuration type (`Test`) which `impl`s each of the
-// configuration traits of pallets we want to use.
 #[derive(Clone, Eq, PartialEq)]
 pub struct Test;