rm dc2 in readme

README.md

@@ -20,7 +20,7 @@ This operator extracts features for video or text with [MDMMT: Multidomain Multi
 Read the text to generate a text embedding. 
 
 ```python
-from towhee.dc2 import pipe, ops, DataCollection
+from towhee import pipe, ops, DataCollection
 
 p = (
     pipe.input('text') \
@@ -36,7 +36,7 @@ Load a video embeddings extracted from different upstream expert networks, such
 
 ```python
 import torch
-from towhee.dc2 import pipe, ops, DataCollection
+from towhee import pipe, ops, DataCollection
 
 
 torch.manual_seed(42)