Replace config field with default value (srml/im-online) (#3388)

* Fix whitespacing

* Replace configurable fields with default values

* Bump version

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

* Fix more whitespacing

* Fix style

substrate/node/cli/src/chain_spec.rs

@@ -19,9 +19,9 @@
 use primitives::{Pair, Public, crypto::UncheckedInto};
 pub use node_primitives::{AccountId, Balance};
 use node_runtime::{
-	BabeConfig,	BalancesConfig, ContractsConfig, CouncilConfig, DemocracyConfig,
+	BabeConfig, BalancesConfig, ContractsConfig, CouncilConfig, DemocracyConfig,
 	ElectionsConfig, GrandpaConfig, ImOnlineConfig, IndicesConfig, Perbill,
-	SessionConfig,	SessionKeys, StakerStatus, StakingConfig, SudoConfig, SystemConfig,
+	SessionConfig, SessionKeys, StakerStatus, StakingConfig, SudoConfig, SystemConfig,
 	TechnicalCommitteeConfig, WASM_BINARY,
 };
 use node_runtime::constants::{time::*, currency::*};
@@ -169,7 +169,6 @@ fn staging_testnet_config_genesis() -> GenesisConfig {
 			authorities: initial_authorities.iter().map(|x| (x.3.clone(), 1)).collect(),
 		}),
 		im_online: Some(ImOnlineConfig {
-			gossip_at: 0,
 			keys: initial_authorities.iter().map(|x| x.4.clone()).collect(),
 		}),
 		grandpa: Some(GrandpaConfig {
@@ -302,7 +301,6 @@ pub fn testnet_genesis(
 			authorities: initial_authorities.iter().map(|x| (x.3.clone(), 1)).collect(),
 		}),
 		im_online: Some(ImOnlineConfig{
-			gossip_at: 0,
 			keys: initial_authorities.iter().map(|x| x.4.clone()).collect(),
 		}),
 		grandpa: Some(GrandpaConfig {

substrate/node/runtime/src/lib.rs

@@ -81,7 +81,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
 	spec_version: 140,
-	impl_version: 140,
+	impl_version: 141,
 	apis: RUNTIME_API_VERSIONS,
 };
 
@@ -436,7 +436,7 @@ construct_runtime!(
 		Treasury: treasury::{Module, Call, Storage, Event<T>},
 		Contracts: contracts,
 		Sudo: sudo,
-		ImOnline: im_online::{Module, Call, Storage, Event, ValidateUnsigned, Config<T>},
+		ImOnline: im_online::{Module, Call, Storage, Event, ValidateUnsigned, Config},
 	}
 );