Fix clippy suggestions. (#179)

* Fix clippy errors.

* Cargo fmt.

* Enable clippy checks.

* Create if does not exist.

* Fix warnings and enable sccache for clippy.

* chmod +x

* Revert and ignore errors.

* Update cancel-workflow-action.

* Fixes.

* Clippy fixes.

* Fix compilation.

* Fix new clippy warnings.

* fmt --all

* Fix the rest.

* fmt --all

* Conditional.

* Bump smallvec.

* Use separate cache dir for clippy to prevent races.

* Remove unused imports in tests

* Remove "useless conversion"

* Move clippy to main worfklow to avoid clashes.

* Fix clippy error.

* Fix remaning clippy errors.

* cargo fmt --all

Co-authored-by: Hernando Castano <castano.ha@gmail.com>

bridges/relays/ethereum/src/rpc_errors.rs

@@ -18,7 +18,6 @@ use crate::ethereum_types::{EthereumHeaderId, TransactionHash as EthereumTransac
 use crate::sync_types::MaybeConnectionError;
 
 use jsonrpsee::client::RequestError;
-use serde_json;
 
 /// Contains common errors that can occur when
 /// interacting with a Substrate or Ethereum node
@@ -79,10 +78,7 @@ impl From<ethabi::Error> for RpcError {
 
 impl MaybeConnectionError for RpcError {
 	fn is_connection_error(&self) -> bool {
-		match *self {
-			RpcError::Request(RequestError::TransportError(_)) => true,
-			_ => false,
-		}
+		matches!(*self, RpcError::Request(RequestError::TransportError(_)))
 	}
 }