modify some style

Former-commit-id: 1b21793543f4a03252e81a86e06ec91fd2a51fa5

src/llamafactory/data/mm_plugin.py

@@ -294,14 +294,12 @@ class LlavaNextPlugin(BasePlugin):
                     if processor.vision_feature_select_strategy == "default":
                         image_seqlen -= 1
                     num_image_tokens += 1
-                    print(image_seqlen)
                     content = content.replace(self.image_token, "{{image}}" * image_seqlen, 1)
 
                 message['content'] = content.replace("{{image}}", self.image_token)
 
         if len(images) != num_image_tokens:
             raise ValueError("The number of images does not match the number of {} tokens".format(IMAGE_PLACEHOLDER))
-        print(messages)
         return messages
 
     @override

tests/data/test_mm_plugin.py

@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import copy
 import os
 from typing import TYPE_CHECKING, Any, Dict, List, Sequence, Tuple