Remove duplicate comments (#6638)

substrate/frame/scheduler/src/lib.rs

@@ -556,8 +556,6 @@ mod tests {
 		weights::constants::RocksDbWeight,
 	};
 	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,
 		testing::Header,
@@ -638,9 +636,6 @@ mod tests {
 		}
 	}
 
-	// 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;
 	parameter_types! {
@@ -699,8 +694,6 @@ mod tests {
 	type Logger = logger::Module<Test>;
 	type Scheduler = Module<Test>;
 
-	// This function basically just builds a genesis storage key/value store according to
-	// our desired mockup.
 	pub fn new_test_ext() -> sp_io::TestExternalities {
 		let t = system::GenesisConfig::default().build_storage::<Test>().unwrap();
 		t.into()