Removed dependance on rococo_parachain_runtime for unrelated stuff (#1500)

* Clean misleading imports `rococo_parachain_runtime::{AccountId, AuraId}`

* Remove dependance on `rococo_parachain_runtime` for unrelated stuff

* fmt + rebase fix

* Addressing review comments

* Addressing review comments

* Fix for `purge_chain_works` works now with `rococo-local` and purge command needs to allow `rococo-native`

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

@@ -59,7 +59,7 @@ pub use sp_runtime::{Perbill, Permill};
 
 use parachains_common::{
 	impls::{AssetsFrom, NonZeroIssuance},
-	AssetId,
+	AccountId, AssetId, Signature,
 };
 use xcm_builder::{
 	AllowKnownQueryResponses, AllowSubscriptionsFrom, AsPrefixedGeneralIndex,
@@ -543,11 +543,6 @@ construct_runtime! {
 	}
 }
 
-/// Alias to 512-bit hash when used in the context of a transaction signature on the chain.
-pub type Signature = sp_runtime::MultiSignature;
-/// Some way of identifying an account on the chain. We intentionally make it equivalent
-/// to the public key of our transaction signing scheme.
-pub type AccountId = <<Signature as sp_runtime::traits::Verify>::Signer as sp_runtime::traits::IdentifyAccount>::AccountId;
 /// Balance of an account.
 pub type Balance = u128;
 /// Index of a transaction in the chain.