use thiserror instead of derive_more for error handling (#10696)

* use thiserror instead of derive_more for error handling

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Update utils/prometheus/src/lib.rs

* Update utils/prometheus/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/client/keystore/src/lib.rs

@@ -28,29 +28,31 @@ mod local;
 pub use local::LocalKeystore;
 
 /// Keystore error.
-#[derive(Debug, derive_more::Display, derive_more::From)]
+#[derive(Debug, thiserror::Error)]
 pub enum Error {
 	/// IO error.
-	Io(io::Error),
+	#[error(transparent)]
+	Io(#[from] io::Error),
 	/// JSON error.
-	Json(serde_json::Error),
+	#[error(transparent)]
+	Json(#[from] serde_json::Error),
 	/// Invalid password.
-	#[display(
-		fmt = "Requested public key and public key of the loaded private key do not match. \n
+	#[error(
+		"Requested public key and public key of the loaded private key do not match. \n
 			This means either that the keystore password is incorrect or that the private key was stored under a wrong public key."
 	)]
 	PublicKeyMismatch,
 	/// Invalid BIP39 phrase
-	#[display(fmt = "Invalid recovery phrase (BIP39) data")]
+	#[error("Invalid recovery phrase (BIP39) data")]
 	InvalidPhrase,
 	/// Invalid seed
-	#[display(fmt = "Invalid seed")]
+	#[error("Invalid seed")]
 	InvalidSeed,
 	/// Public key type is not supported
-	#[display(fmt = "Key crypto type is not supported")]
+	#[error("Key crypto type is not supported")]
 	KeyNotSupported(KeyTypeId),
 	/// Keystore unavailable
-	#[display(fmt = "Keystore unavailable")]
+	#[error("Keystore unavailable")]
 	Unavailable,
 }
 
@@ -69,13 +71,3 @@ impl From<Error> for TraitError {
 		}
 	}
 }
-
-impl std::error::Error for Error {
-	fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
-		match self {
-			Error::Io(ref err) => Some(err),
-			Error::Json(ref err) => Some(err),
-			_ => None,
-		}
-	}
-}