helper/schema: remove swap tracking

helper/schema/schema_sort.go

@@ -4,7 +4,6 @@ package schema
 // to a schema.
 type listSort struct {
 	List   []interface{}
-	Map    map[int]int
 	Schema *Schema
 }
 
@@ -18,19 +17,4 @@ func (s *listSort) Less(i, j int) bool {
 
 func (s *listSort) Swap(i, j int) {
 	s.List[i], s.List[j] = s.List[j], s.List[i]
-
-	// Build the mapping. We have to make sure we get to the proper
-	// place where the final target is, not the current value.
-	if s.Map == nil {
-		s.Map = make(map[int]int)
-	}
-	i2 := i
-	j2 := j
-	if v, ok := s.Map[i]; ok {
-		i2 = v
-	}
-	if v, ok := s.Map[j]; ok {
-		j2 = v
-	}
-	s.Map[i], s.Map[j] = j2, i2
 }

helper/schema/schema_sort_test.go

@@ -26,15 +26,4 @@ func TestListSort(t *testing.T) {
 	if !reflect.DeepEqual(s.List, expected) {
 		t.Fatalf("bad: %#v", s.List)
 	}
-
-	expectedMap := map[int]int{
-		0: 2,
-		1: 1,
-		2: 3,
-		3: 4,
-		4: 0,
-	}
-	if !reflect.DeepEqual(s.Map, expectedMap) {
-		t.Fatalf("bad: %#v", s.Map)
-	}
 }