polkadot: remove grandpa pause support (#2511)

This was never used and we probably don't need it anyway.

polkadot/node/service/src/lib.rs

@@ -623,7 +623,6 @@ where
 #[cfg(feature = "full-node")]
 pub struct NewFullParams<OverseerGenerator: OverseerGen> {
 	pub is_parachain_node: IsParachainNode,
-	pub grandpa_pause: Option<(u32, u32)>,
 	pub enable_beefy: bool,
 	/// Whether to enable the block authoring backoff on production networks
 	/// where it isn't enabled by default.
@@ -717,7 +716,6 @@ pub fn new_full<OverseerGenerator: OverseerGen>(
 	mut config: Configuration,
 	NewFullParams {
 		is_parachain_node,
-		grandpa_pause,
 		enable_beefy,
 		force_authoring_backoff,
 		jaeger_agent,
@@ -1248,32 +1246,14 @@ pub fn new_full<OverseerGenerator: OverseerGen>(
 		// provide better guarantees of block and vote data availability than
 		// the observer.
 
-		// add a custom voting rule to temporarily stop voting for new blocks
-		// after the given pause block is finalized and restarting after the
-		// given delay.
-		let mut builder = grandpa::VotingRulesBuilder::default();
+		let mut voting_rules_builder = grandpa::VotingRulesBuilder::default();
 
 		#[cfg(not(feature = "malus"))]
 		let _malus_finality_delay = None;
 
 		if let Some(delay) = _malus_finality_delay {
 			info!(?delay, "Enabling malus finality delay",);
-			builder = builder.add(grandpa::BeforeBestBlockBy(delay));
-		};
-
-		let voting_rule = match grandpa_pause {
-			Some((block, delay)) => {
-				info!(
-					block_number = %block,
-					delay = %delay,
-					"GRANDPA scheduled voting pause set for block #{} with a duration of {} blocks.",
-					block,
-					delay,
-				);
-
-				builder.add(grandpa_support::PauseAfterBlockFor(block, delay)).build()
-			},
-			None => builder.build(),
+			voting_rules_builder = voting_rules_builder.add(grandpa::BeforeBestBlockBy(delay));
 		};
 
 		let grandpa_config = grandpa::GrandpaParams {
@@ -1281,7 +1261,7 @@ pub fn new_full<OverseerGenerator: OverseerGen>(
 			link: link_half,
 			network: network.clone(),
 			sync: sync_service.clone(),
-			voting_rule,
+			voting_rule: voting_rules_builder.build(),
 			prometheus_registry: prometheus_registry.clone(),
 			shared_voter_state,
 			telemetry: telemetry.as_ref().map(|x| x.handle()),