Delete .github/PULL_REQUEST_TEMPLATE.md (#12564)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,13 +0,0 @@
-<!--
-Thank you for submitting a YOLOv5 🚀 Pull Request! We want to make contributing to YOLOv5 as easy and transparent as possible. A few tips to get you started:
-
-- Search existing YOLOv5 [PRs](https://github.com/ultralytics/yolov5/pull) to see if a similar PR already exists.
-- Link this PR to a YOLOv5 [issue](https://github.com/ultralytics/yolov5/issues) to help us understand what bug fix or feature is being implemented.
-- Provide before and after profiling/inference/training results to help us quantify the improvement your PR provides (if applicable).
-
-Please see our ✅ [Contributing Guide](https://docs.ultralytics.com/help/contributing) for more details.
-
-Note that Copilot will summarize this PR below, do not modify the 'copilot:all' line.
--->
-
-copilot:all