use macro for default impl in PairingClient struct

pairing_api/src/pairing.rs

@@ -111,17 +111,11 @@ impl Pairing {
 }
 
 /// Client for managing WalletConnect pairings.
-#[derive(Debug)]
+#[derive(Debug, Default)]
 pub struct PairingClient {
     pub pairings: Arc<Mutex<HashMap<String, Pairing>>>,
 }
 
-impl Default for PairingClient {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
 impl PairingClient {
     /// initializes the client with persisted storage and a network connection
     pub fn new() -> Self {