Remove useless imports (#11136)

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

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

substrate/frame/assets/src/lib.rs

@@ -147,7 +147,7 @@ use sp_runtime::{
 	},
 	ArithmeticError, TokenError,
 };
-use sp_std::{borrow::Borrow, convert::TryInto, prelude::*};
+use sp_std::{borrow::Borrow, prelude::*};
 
 use frame_support::{
 	dispatch::{DispatchError, DispatchResult},

substrate/frame/bags-list/fuzzer/src/main.rs

@@ -30,7 +30,6 @@
 use frame_election_provider_support::{SortedListProvider, VoteWeight};
 use honggfuzz::fuzz;
 use pallet_bags_list::mock::{AccountId, BagsList, ExtBuilder};
-use std::convert::From;
 
 const ID_RANGE: AccountId = 25_000;
 

substrate/frame/bags-list/remote-tests/src/sanity_check.rs

@@ -23,7 +23,6 @@ use frame_support::{
 };
 use remote_externalities::{Builder, Mode, OnlineConfig};
 use sp_runtime::{traits::Block as BlockT, DeserializeOwned};
-use sp_std::prelude::*;
 
 /// Execute the sanity check of the bags-list.
 pub async fn execute<Runtime: crate::RuntimeT, Block: BlockT + DeserializeOwned>(

substrate/frame/contracts/src/tests.rs

@@ -96,7 +96,6 @@ pub mod test_utils {
 	}
 	macro_rules! assert_return_code {
 		( $x:expr , $y:expr $(,)? ) => {{
-			use sp_std::convert::TryInto;
 			assert_eq!(u32::from_le_bytes($x.data[..].try_into().unwrap()), $y as u32);
 		}};
 	}

substrate/frame/conviction-voting/src/vote.rs

@@ -25,7 +25,7 @@ use sp_runtime::{
 	traits::{Saturating, Zero},
 	RuntimeDebug,
 };
-use sp_std::{convert::TryFrom, prelude::*, result::Result};
+use sp_std::prelude::*;
 
 /// A number of lock periods, plus a vote, one way or the other.
 #[derive(Copy, Clone, Eq, PartialEq, Default, RuntimeDebug, MaxEncodedLen)]

substrate/frame/election-provider-support/src/mock.rs

@@ -21,7 +21,6 @@
 
 use std::{
 	collections::{HashMap, HashSet},
-	convert::TryInto,
 	hash::Hash,
 };
 

substrate/frame/election-provider-support/src/tests.rs

@@ -22,7 +22,6 @@
 use crate::{mock::*, IndexAssignment, NposSolution};
 use frame_support::traits::ConstU32;
 use rand::SeedableRng;
-use std::convert::TryInto;
 
 mod solution_type {
 	use super::*;
@@ -30,7 +29,7 @@ mod solution_type {
 	// these need to come from the same dev-dependency `frame-election-provider-support`, not from
 	// the crate.
 	use crate::{generate_solution_type, Assignment, Error as NposError, NposSolution};
-	use sp_std::{convert::TryInto, fmt::Debug};
+	use sp_std::fmt::Debug;
 
 	#[allow(dead_code)]
 	mod __private {

substrate/frame/election-provider-support/src/traits.rs

@@ -22,16 +22,12 @@ use codec::Encode;
 use scale_info::TypeInfo;
 use sp_arithmetic::traits::{Bounded, UniqueSaturatedInto};
 use sp_npos_elections::{ElectionScore, Error, EvaluateSupport};
-use sp_std::{
-	convert::{TryFrom, TryInto},
-	fmt::Debug,
-	prelude::*,
-};
+use sp_std::{fmt::Debug, prelude::*};
 
 /// An opaque index-based, NPoS solution type.
 pub trait NposSolution
 where
-	Self: Sized + for<'a> sp_std::convert::TryFrom<&'a [IndexAssignmentOf<Self>], Error = Error>,
+	Self: Sized + for<'a> TryFrom<&'a [IndexAssignmentOf<Self>], Error = Error>,
 {
 	/// The maximum number of votes that are allowed.
 	const LIMIT: usize;

substrate/frame/im-online/src/lib.rs

@@ -104,7 +104,7 @@ use sp_staking::{
 	offence::{Kind, Offence, ReportOffence},
 	SessionIndex,
 };
-use sp_std::{convert::TryInto, prelude::*};
+use sp_std::prelude::*;
 pub use weights::WeightInfo;
 
 pub mod sr25519 {

substrate/frame/preimage/src/lib.rs

@@ -37,7 +37,7 @@ mod tests;
 pub mod weights;
 
 use sp_runtime::traits::{BadOrigin, Hash, Saturating};
-use sp_std::{convert::TryFrom, prelude::*};
+use sp_std::prelude::*;
 
 use codec::{Decode, Encode, MaxEncodedLen};
 use frame_support::{

substrate/frame/proxy/src/lib.rs

@@ -48,7 +48,7 @@ use sp_runtime::{
 	traits::{Dispatchable, Hash, Saturating, TrailingZeroInput, Zero},
 	DispatchResult,
 };
-use sp_std::{convert::TryInto, prelude::*};
+use sp_std::prelude::*;
 pub use weights::WeightInfo;
 
 pub use pallet::*;

substrate/frame/randomness-collective-flip/src/lib.rs

@@ -71,7 +71,6 @@ use safe_mix::TripletMix;
 use codec::Encode;
 use frame_support::traits::Randomness;
 use sp_runtime::traits::{Hash, Saturating};
-use sp_std::prelude::*;
 
 const RANDOM_MATERIAL_LEN: u32 = 81;
 

substrate/frame/staking/reward-curve/src/lib.rs

@@ -24,7 +24,6 @@ use proc_macro::TokenStream;
 use proc_macro2::{Span, TokenStream as TokenStream2};
 use proc_macro_crate::{crate_name, FoundCrate};
 use quote::{quote, ToTokens};
-use std::convert::TryInto;
 use syn::parse::{Parse, ParseStream};
 
 /// Accepts a number of expressions to create a instance of PiecewiseLinear which represents the

substrate/frame/staking/src/lib.rs

@@ -316,7 +316,7 @@ use sp_staking::{
 	offence::{Offence, OffenceError, ReportOffence},
 	EraIndex, SessionIndex,
 };
-use sp_std::{collections::btree_map::BTreeMap, convert::From, prelude::*};
+use sp_std::{collections::btree_map::BTreeMap, prelude::*};
 pub use weights::WeightInfo;
 
 pub use pallet::{pallet::*, *};

substrate/frame/staking/src/pallet/mod.rs

@@ -33,7 +33,7 @@ use sp_runtime::{
 	DispatchError, Perbill, Percent,
 };
 use sp_staking::{EraIndex, SessionIndex};
-use sp_std::{cmp::max, convert::From, prelude::*};
+use sp_std::{cmp::max, prelude::*};
 
 mod impls;
 

substrate/frame/support/procedural/src/construct_runtime/expand/event.rs

@@ -127,7 +127,7 @@ fn expand_event_conversion(
 				Event::#variant_name(x)
 			}
 		}
-		impl #scrate::sp_std::convert::TryInto<#pallet_event> for Event {
+		impl TryInto<#pallet_event> for Event {
 			type Error = ();
 
 			fn try_into(self) -> #scrate::sp_std::result::Result<#pallet_event, Self::Error> {

substrate/frame/support/procedural/src/construct_runtime/expand/origin.rs

@@ -230,7 +230,7 @@ pub fn expand_outer_origin(
 			}
 		}
 
-		impl #scrate::sp_std::convert::TryFrom<OriginCaller> for #system_path::Origin<#runtime> {
+		impl TryFrom<OriginCaller> for #system_path::Origin<#runtime> {
 			type Error = OriginCaller;
 			fn try_from(x: OriginCaller)
 				-> #scrate::sp_std::result::Result<#system_path::Origin<#runtime>, OriginCaller>
@@ -359,7 +359,7 @@ fn expand_origin_pallet_conversions(
 			}
 		}
 
-		impl #scrate::sp_std::convert::TryFrom<OriginCaller> for #pallet_origin {
+		impl TryFrom<OriginCaller> for #pallet_origin {
 			type Error = OriginCaller;
 			fn try_from(
 				x: OriginCaller,

substrate/frame/support/procedural/src/pallet/expand/error.rs

@@ -162,7 +162,7 @@ pub fn expand_error(def: &mut Def) -> proc_macro2::TokenStream {
 
 				#frame_support::sp_runtime::DispatchError::Module(#frame_support::sp_runtime::ModuleError {
 					index,
-					error: core::convert::TryInto::try_into(encoded).expect("encoded error is resized to be equal to the maximum encoded error size; qed"),
+					error: TryInto::try_into(encoded).expect("encoded error is resized to be equal to the maximum encoded error size; qed"),
 					message: Some(err.as_str()),
 				})
 			}

substrate/frame/support/src/error.rs

@@ -152,7 +152,7 @@ macro_rules! decl_error {
 
 				$crate::sp_runtime::DispatchError::Module($crate::sp_runtime::ModuleError {
 					index,
-					error: core::convert::TryInto::try_into(error).expect("encoded error is resized to be equal to the maximum encoded error size; qed"),
+					error: TryInto::try_into(error).expect("encoded error is resized to be equal to the maximum encoded error size; qed"),
 					message: Some(err.as_str()),
 				})
 			}

substrate/frame/support/src/lib.rs

@@ -127,13 +127,11 @@ impl TypeId for PalletId {
 macro_rules! bounded_vec {
 	($ ($values:expr),* $(,)?) => {
 		{
-			use $crate::sp_std::convert::TryInto as _;
 			$crate::sp_std::vec![$($values),*].try_into().unwrap()
 		}
 	};
 	( $value:expr ; $repetition:expr ) => {
 		{
-			use $crate::sp_std::convert::TryInto as _;
 			$crate::sp_std::vec![$value ; $repetition].try_into().unwrap()
 		}
 	}

substrate/frame/support/src/storage/bounded_btree_map.rs

@@ -22,10 +22,7 @@ use crate::{
 	traits::{Get, TryCollect},
 };
 use codec::{Decode, Encode, MaxEncodedLen};
-use sp_std::{
-	borrow::Borrow, collections::btree_map::BTreeMap, convert::TryFrom, marker::PhantomData,
-	ops::Deref,
-};
+use sp_std::{borrow::Borrow, collections::btree_map::BTreeMap, marker::PhantomData, ops::Deref};
 
 /// A bounded map based on a B-Tree.
 ///

substrate/frame/support/src/storage/bounded_btree_set.rs

@@ -22,10 +22,7 @@ use crate::{
 	traits::{Get, TryCollect},
 };
 use codec::{Decode, Encode, MaxEncodedLen};
-use sp_std::{
-	borrow::Borrow, collections::btree_set::BTreeSet, convert::TryFrom, marker::PhantomData,
-	ops::Deref,
-};
+use sp_std::{borrow::Borrow, collections::btree_set::BTreeSet, marker::PhantomData, ops::Deref};
 
 /// A bounded set based on a B-Tree.
 ///
@@ -324,7 +321,6 @@ pub mod test {
 	use crate::Twox128;
 	use frame_support::traits::ConstU32;
 	use sp_io::TestExternalities;
-	use sp_std::convert::TryInto;
 
 	crate::generate_storage_alias! { Prefix, Foo => Value<BoundedBTreeSet<u32, ConstU32<7>>> }
 	crate::generate_storage_alias! { Prefix, FooMap => Map<(Twox128, u32), BoundedBTreeSet<u32, ConstU32<7>>> }

substrate/frame/support/src/storage/weak_bounded_vec.rs

@@ -27,7 +27,7 @@ use core::{
 	ops::{Deref, Index, IndexMut},
 	slice::SliceIndex,
 };
-use sp_std::{convert::TryFrom, marker::PhantomData, prelude::*};
+use sp_std::{marker::PhantomData, prelude::*};
 
 /// A weakly bounded vector.
 ///
@@ -320,7 +320,6 @@ pub mod test {
 	use crate::Twox128;
 	use frame_support::traits::ConstU32;
 	use sp_io::TestExternalities;
-	use sp_std::convert::TryInto;
 
 	crate::generate_storage_alias! { Prefix, Foo => Value<WeakBoundedVec<u32, ConstU32<7>>> }
 	crate::generate_storage_alias! { Prefix, FooMap => Map<(Twox128, u32), WeakBoundedVec<u32, ConstU32<7>>> }

substrate/frame/uniques/src/benchmarking.rs

@@ -30,7 +30,7 @@ use frame_support::{
 };
 use frame_system::RawOrigin as SystemOrigin;
 use sp_runtime::traits::Bounded;
-use sp_std::{convert::TryInto, prelude::*};
+use sp_std::prelude::*;
 
 use crate::Pallet as Uniques;
 

substrate/frame/vesting/src/lib.rs

@@ -74,7 +74,7 @@ use sp_runtime::{
 	},
 	RuntimeDebug,
 };
-use sp_std::{convert::TryInto, fmt::Debug, prelude::*};
+use sp_std::{fmt::Debug, prelude::*};
 pub use vesting_info::*;
 pub use weights::WeightInfo;