Companion to Substrate #11490 (#1305)

* Fix warnings

* Bump

* Fix build

* Fix the build

* Fixes

* Formatting

Co-authored-by: Bastian Köcher <info@kchr.de>

parachains/runtimes/testing/rococo-parachain/src/lib.rs

@@ -592,6 +592,7 @@ 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`
+		#[allow(deprecated)]
 		migration::remove_storage_prefix(b"RandomnessCollectiveFlip", b"RandomMaterial", b"");
 		<Runtime as frame_system::Config>::DbWeight::get().writes(1)
 	}