remove duplicate var

raft.go

@@ -1758,11 +1758,8 @@ func (r *Raft) requestPreVote(rpc RPC, req *RequestPreVoteRequest) {
 	// there is a known leader. But if the leader initiated a leadership transfer,
 	// vote!
 	var candidate ServerAddress
-
-	// For older raft version ID is not part of the packed message
-	// We assume that the peer is part of the configuration and skip this check
-
 	candidateID := ServerID(req.ID)
+
 	// if the Servers list is empty that mean the cluster is very likely trying to bootstrap,
 	// Grant the vote
 	if len(r.configurations.latest.Servers) > 0 && !inConfiguration(r.configurations.latest, candidateID) {
@@ -1796,8 +1793,6 @@ func (r *Raft) requestPreVote(rpc RPC, req *RequestPreVoteRequest) {
 	// This could happen when a node, previously voter, is converted to non-voter
 	// The reason we need to step in is to permit to the cluster to make progress in such a scenario
 	// More details about that in https://github.com/hashicorp/raft/pull/526
-
-	candidateID := ServerID(req.ID)
 	if len(r.configurations.latest.Servers) > 0 && !hasVote(r.configurations.latest, candidateID) {
 		r.logger.Warn("rejecting pre-vote request since node is not a voter", "from", candidate)
 		return