Remove useless imports (#11136)

Because `TryInto`/`TryFrom` are in prelude by default from edition 2021

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

substrate/client/cli/src/commands/insert_key.rs

@@ -25,7 +25,7 @@ use sc_keystore::LocalKeystore;
 use sc_service::config::{BasePath, KeystoreConfig};
 use sp_core::crypto::{KeyTypeId, SecretString};
 use sp_keystore::{SyncCryptoStore, SyncCryptoStorePtr};
-use std::{convert::TryFrom, sync::Arc};
+use std::sync::Arc;
 
 /// The `insert` command
 #[derive(Debug, Clone, Parser)]

substrate/client/cli/src/commands/utils.rs

@@ -31,7 +31,7 @@ use sp_core::{
 	Pair,
 };
 use sp_runtime::{traits::IdentifyAccount, MultiSigner};
-use std::{convert::TryFrom, io::Read, path::PathBuf};
+use std::{io::Read, path::PathBuf};
 
 /// Public key type for Runtime
 pub type PublicFor<P> = <P as sp_core::Pair>::Public;

substrate/client/cli/src/commands/verify.rs

@@ -66,7 +66,7 @@ impl VerifyCmd {
 fn verify<Pair>(sig_data: Vec<u8>, message: Vec<u8>, uri: &str) -> error::Result<()>
 where
 	Pair: sp_core::Pair,
-	Pair::Signature: for<'a> std::convert::TryFrom<&'a [u8]>,
+	Pair::Signature: for<'a> TryFrom<&'a [u8]>,
 {
 	let signature =
 		Pair::Signature::try_from(&sig_data).map_err(|_| error::Error::SignatureFormatInvalid)?;