fix linter issues

libs/pubsub/query/query.peg.go

@@ -1,3 +1,4 @@
+// nolint
 package query
 
 //go:generate peg -inline -switch query.peg

types/validator_set.go

@@ -39,7 +39,7 @@ func NewValidatorSet(vals []*Validator) *ValidatorSet {
 		Validators: validators,
 	}
 
-	if vals != nil && len(vals) > 0 {
+	if len(vals) > 0 {
 		vs.IncrementAccum(1)
 	}