Update Pallet placeholder struct as per FRAME v2 (#14348)

* Update Pallet placeholder struct as per FRAME v3

* ".git/.scripts/commands/fmt/fmt.sh"

* Update lib.rs

Removed the unused import

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Co-authored-by: command-bot <>

substrate/frame/scheduler/src/mock.rs

@@ -50,7 +50,7 @@ pub mod logger {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::hooks]
 	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {}