rm pull request

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,9 +0,0 @@
-<!-- Demo: https://github.com/PaddlePaddle/PaddleNLP/pull/26 -->
-### PR types
-<!-- One of [ New features | Bug fixes | Function optimization | Performance optimization | Breaking changes | Others ] -->
-
-### PR changes
-<!-- One of [ Models | APIs | Docs | Others ] -->
-
-### Describe
-<!-- Describe what this PR does -->