blobstore/blobstore.go
func Delete(c context.Context, blobKey appengine.BlobKey) error {
	return DeleteMulti(c, []appengine.BlobKey{blobKey})
}
func Delete(c context.Context, blobKey appengine.BlobKey) error {
	return DeleteMulti(c, []appengine.BlobKey{blobKey})
}
// Delete deletes a blob.