Update 2020-10-26-pytorch-1.7-released.md

Author: wookim3

_posts/2020-10-26-pytorch-1.7-released.md

@@ -245,7 +245,7 @@ tensor_image = decode_image(raw_data)
 scripted_read_image = torch.jit.script(read_image)
 ```
 ## [Stable] RetinaNet detection model
-This release adds pretrained models for RetinaNet with a ResNet50 backbone from [Focal Loss for Dense Object Detection](https://arxiv.org/abs/1708.02002), delivering improved accuracy on COCO val2017.
+This release adds pretrained models for RetinaNet with a ResNet50 backbone from [Focal Loss for Dense Object Detection](https://arxiv.org/abs/1708.02002).
 
 ## [Beta] New Video Reader API
 This release introduces a new video reading abstraction, which gives more fine-grained control of iteration over videos. It supports image and audio, and implements an iterator interface so that it is interoperable with other the python libraries such as itertools.