remove unused closer field

terraform/transform_destroy_edge.go

@@ -196,11 +196,6 @@ func (t *pruneUnusedNodesTransformer) Transform(g *Graph) error {
 		m.addr = path
 		m.nodes = append(m.nodes, v)
 
-		// We need to keep track of the closers, to make sure they don't look
-		// for an expansion if there's nothing being expanded.
-		if c, ok := v.(*nodeCloseModule); ok {
-			m.closer = c
-		}
 		moduleMap[path.String()] = m
 	}
 
@@ -231,7 +226,6 @@ func (t *pruneUnusedNodesTransformer) Transform(g *Graph) error {
 type pruneUnusedNodesMod struct {
 	addr  addrs.Module
 	nodes []dag.Vertex
-	closer *nodeCloseModule
 }
 
 // Remove any unused locals, variables, outputs and expanders.  Since module