rm _types

Signed-off-by: junjie.jiang <junjie.jiang@zilliz.com>

swag.py

@@ -59,7 +59,7 @@ class Swag(NNOperator):
         self.model.eval()
 
     @arg(1, to_image_color('RGB'))
-    def __call__(self, img: towhee._types.Image) -> numpy.ndarray:
+    def __call__(self, img: 'towhee.types.Image') -> numpy.ndarray:
         img = PILImage.fromarray(img.astype('uint8'), 'RGB')
         if not self.skip_tfms:
             img = self.tfms(img).unsqueeze(0)