remove IsFullDestroy workaround

IsFullDestroy was a workaround during apply to detect when the change
set was created by a destroy plan. This no longer works correctly, and
we need to fall back to the UIMode set in the plan.

internal/plans/changes_sync.go

@@ -21,24 +21,6 @@ type ChangesSync struct {
 	changes *Changes
 }
 
-// IsFullDestroy returns true if the set of changes indicates we are doing a
-// destroy of all resources.
-func (cs *ChangesSync) IsFullDestroy() bool {
-	if cs == nil {
-		panic("FullDestroy on nil ChangesSync")
-	}
-	cs.lock.Lock()
-	defer cs.lock.Unlock()
-
-	for _, c := range cs.changes.Resources {
-		if c.Action != Delete {
-			return false
-		}
-	}
-
-	return true
-}
-
 // AppendResourceInstanceChange records the given resource instance change in
 // the set of planned resource changes.
 //

internal/terraform/evaluate.go

@@ -728,7 +728,7 @@ func (d *evaluationStateData) GetResource(addr addrs.Resource, rng tfdiags.Sourc
 
 	// Decode all instances in the current state
 	instances := map[addrs.InstanceKey]cty.Value{}
-	pendingDestroy := d.Evaluator.Changes.IsFullDestroy()
+	pendingDestroy := d.Operation == walkDestroy
 	for key, is := range rs.Instances {
 		if is == nil || is.Current == nil {
 			// Assume we're dealing with an instance that hasn't been created yet.