chore(*): update pr template (#828)

.github/PULL_REQUEST_TEMPLATE.md

@@ -9,7 +9,6 @@ Add your description
 Fixes #
 
 Reference to #
-<!-- 填在 Fixes，PR 合并就会关 issue。填在 Reference to 会关联 issue，不会联动关闭，caicloud/quality 请用这个。-->
 
 **Special notes for your reviewer**:
 
@@ -34,13 +33,7 @@ Reference to #
 NONE
 ```
 
-<!--  Thanks for sending a pull request! Here are some tips:
-
-1. https://github.com/caicloud/engineering/blob/master/docs/review_conventions.md  <-- what is the review process looks like
-2. https://github.com/caicloud/engineering/blob/master/docs/commit_conventions.md  <-- how to structure your git commit
-3. https://github.com/caicloud/engineering/blob/master/docs/caicloud_bot.md        <-- how to work with caicloud bot
-
-Other tips from Kubernetes cmomunity:
+<!--  Thanks for sending a pull request! Here are some tips from Kubernetes cmomunity:
 
 1. If this is your first time, read our contributor guidelines https://git.k8s.io/community/contributors/devel/pull-requests.md#the-pr-submit-process and developer guide https://git.k8s.io/community/contributors/devel/development.md#development-guide
 2. If you want *faster* PR reviews, read how: https://git.k8s.io/community/contributors/devel/pull-requests.md#best-practices-for-faster-reviews