fix kitchensink genesis

Author: Ank4n

substrate/bin/node/runtime/src/genesis_config_presets.rs

@@ -58,7 +58,7 @@ pub fn kitchensink_genesis(
 	stakers: Vec<Staker>,
 	staking_playground_config: Option<StakingPlaygroundConfig>,
 ) -> serde_json::Value {
-	let (validator_count, min_validator_count, dev_stakers) = match staking_playground_config {
+	let (validator_count, min_validator_count, _dev_stakers) = match staking_playground_config {
 		Some(c) => (c.validator_count, c.minimum_validator_count, Some(c.dev_stakers)),
 		None => {
 			let authorities_count = initial_authorities.len() as u32;
@@ -90,7 +90,6 @@ pub fn kitchensink_genesis(
 				.expect("Too many invulnerable validators: upper limit is MaxInvulnerables from pallet staking config"),
 			slash_reward_fraction: Perbill::from_percent(10),
 			stakers,
-			dev_stakers
 		},
 		elections: ElectionsConfig {
 			members: collective.iter().cloned().map(|member| (member, STASH)).collect(),