Fix Clippy (#10596)

* fix clippy

* fmt

substrate/client/chain-spec/src/chain_spec.rs

@@ -229,7 +229,7 @@ impl<G, E> ChainSpec<G, E> {
 
 	/// Optional network fork identifier.
 	pub fn fork_id(&self) -> Option<&str> {
-		self.client_spec.fork_id.as_ref().map(String::as_str)
+		self.client_spec.fork_id.as_deref()
 	}
 
 	/// Additional loosly-typed properties of the chain.

substrate/client/service/src/client/call_executor.rs

@@ -246,9 +246,7 @@ where
 					&runtime_code,
 					self.spawn_handle.clone(),
 				)
-				.with_storage_transaction_cache(
-					storage_transaction_cache.as_mut().map(|c| &mut **c),
-				)
+				.with_storage_transaction_cache(storage_transaction_cache.as_deref_mut())
 				.set_parent_hash(at_hash);
 				state_machine.execute_using_consensus_failure_handler(
 					execution_manager,