seal: Remove ext_dispatch_call and ext_get_runtime_storage (#6464)

Those are way too hard to audit and make only sense with specific
chains. They shouldn't be in the core API.

substrate/bin/node/runtime/src/lib.rs

@@ -582,7 +582,6 @@ impl pallet_contracts::Trait for Runtime {
 	type Time = Timestamp;
 	type Randomness = RandomnessCollectiveFlip;
 	type Currency = Balances;
-	type Call = Call;
 	type Event = Event;
 	type DetermineContractAddress = pallet_contracts::SimpleAddressDeterminer<Runtime>;
 	type TrieIdGenerator = pallet_contracts::TrieIdFromParentCounter<Runtime>;