Remove the NextState check that is empty. Already been checked as r…

…equired in the `Transition` struct field.

Signed-off-by: André R. de Miranda <andre@galgo.tech>

model/util_validator.go

@@ -19,7 +19,7 @@ import (
 )
 
 func validTransitionAndEnd(structLevel validator.StructLevel, field interface{}, transition *Transition, end *End) {
- hasTransition := transition != nil && transition.NextState != ""
+ hasTransition := transition != nil
  isEnd := end != nil && (end.Terminate || end.ContinueAs != nil || len(end.ProduceEvents) > 0) // TODO: check the spec continueAs/produceEvents to see how it influences the end
 
  if !hasTransition && !isEnd {