Repair `convert_coco()` box-segment discarding (#6689)

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/__init__.py

@@ -1,6 +1,6 @@
 # Ultralytics YOLO 🚀, AGPL-3.0 license
 
-__version__ = '8.0.220'
+__version__ = '8.0.221'
 
 from ultralytics.models import RTDETR, SAM, YOLO
 from ultralytics.models.fastsam import FastSAM

ultralytics/data/converter.py

@@ -129,7 +129,6 @@ def convert_coco(labels_dir='../coco/annotations/',
                             s = [j for i in ann['segmentation'] for j in i]  # all segments concatenated
                             s = (np.array(s).reshape(-1, 2) / np.array([w, h])).reshape(-1).tolist()
                         s = [cls] + s
-                    if s not in segments:
                         segments.append(s)
                     if use_keypoints and ann.get('keypoints') is not None:
                         keypoints.append(box + (np.array(ann['keypoints']).reshape(-1, 3) /