Remove randomness collective flip new (#726)

* randomess collective flip removed

* cargo.lock + fix

* remove migration for statemint

* fmt fix

* update cargo.lock

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

cumulus/polkadot-parachains/rococo/src/lib.rs

@@ -188,7 +188,7 @@ impl frame_system::Config for Runtime {
 	type AccountData = pallet_balances::AccountData<Balance>;
 	type OnNewAccount = ();
 	type OnKilledAccount = ();
-	type DbWeight = ();
+	type DbWeight = RocksDbWeight;
 	type BaseCallFilter = frame_support::traits::Everything;
 	type SystemWeightInfo = ();
 	type BlockWeights = RuntimeBlockWeights;
@@ -232,8 +232,6 @@ impl pallet_balances::Config for Runtime {
 	type ReserveIdentifier = [u8; 8];
 }
 
-impl pallet_randomness_collective_flip::Config for Runtime {}
-
 parameter_types! {
 	pub const OperationalFeeMultiplier: u8 = 5;
 }
@@ -512,7 +510,6 @@ construct_runtime! {
 		System: frame_system::{Pallet, Call, Storage, Config, Event<T>},
 		Timestamp: pallet_timestamp::{Pallet, Call, Storage, Inherent},
 		Sudo: pallet_sudo::{Pallet, Call, Storage, Config<T>, Event<T>},
-		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Pallet, Storage},
 		TransactionPayment: pallet_transaction_payment::{Pallet, Storage},
 
 		ParachainSystem: cumulus_pallet_parachain_system::{
@@ -579,8 +576,19 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPallets,
+	RemoveCollectiveFlip,
 >;
 
+pub struct RemoveCollectiveFlip;
+impl frame_support::traits::OnRuntimeUpgrade for RemoveCollectiveFlip {
+	fn on_runtime_upgrade() -> Weight {
+		use frame_support::storage::migration;
+		// Remove the storage value `RandomMaterial` from removed pallet `RandomnessCollectiveFlip`
+		migration::remove_storage_prefix(b"RandomnessCollectiveFlip", b"RandomMaterial", b"");
+		<Runtime as frame_system::Config>::DbWeight::get().writes(1)
+	}
+}
+
 impl_runtime_apis! {
 	impl sp_api::Core<Block> for Runtime {
 		fn version() -> RuntimeVersion {