Revert "Add shared content label to namespaces"

This reverts commit e692a01926.

Signed-off-by: Cody Roseborough <cdr@amazon.com>

metadata/images.go

@@ -55,28 +55,6 @@ func (s *imageStore) Get(ctx context.Context, name string) (images.Image, error)
 
 	if err := view(ctx, s.db, func(tx *bolt.Tx) error {
 		bkt := getImagesBucket(tx, namespace)
-		if bkt == nil || bkt.Bucket([]byte(name)) == nil {
-			nsbkt := getNamespacesBucket(tx)
-			cur := nsbkt.Cursor()
-			for k, _ := cur.First(); k != nil; k, _ = cur.Next() {
-				// If this namespace has the sharedlabel
-				if hasSharedLabel(tx, string(k)) {
-					// and has the image we are looking for
-					bkt = getImagesBucket(tx, string(k))
-					if bkt == nil {
-						continue
-					}
-
-					ibkt := bkt.Bucket([]byte(name))
-					if ibkt == nil {
-						continue
-					}
-					// we are done
-					break
-				}
-
-			}
-		}
 		if bkt == nil {
 			return fmt.Errorf("image %q: %w", name, errdefs.ErrNotFound)
 		}