Simplify PR template (PegaSysEng#142)

.github/pull_request_template.md

@@ -1,43 +1,8 @@
-<!--  Thanks for sending a pull request!  Here are some tips for you:
-1. If this is your first time, read our contributor guidelines 
-https://github.com/PegaSysEng/pantheon/blob/master/CONTRIBUTING.md#your-first-code-contribution
-2. Label the PR appropriately how to mark it: 
-https://github.com/PegaSysEng/pantheon/blob/master/CONTRIBUTING.md#pull-request-labels
--->
+<!-- Thanks for sending a pull request! Please check out our contribution guidelines: -->
+<!-- https://github.com/PegaSysEng/pantheon/blob/master/CONTRIBUTING.md -->
 
 ## PR description
 
-<!--- Describe your changes in detail, including motivation and context -->
-
-**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
-Fixes #
-
-## Related Issue(s)
-
-<!--- Please link to related issue(s) here: -->
-
-## Types of changes
-
-<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
-
-- [ ] Docs change / refactoring / dependency upgrade
-- [ ] Bug fix (non-breaking change which fixes an issue)
-- [ ] New feature (non-breaking change which adds functionality)
-- [ ] Breaking change (fix or feature that would cause existing functionality to change)
-
-## Release note
-<!--  Write your release note:
-1. Enter your extended release note in the below block. If the PR requires additional action from users switching to the new release, include the string "action required".
-2. If no release note is required, just write "NONE".
--->
-```release-note
-
-```
-
-## Prerequisites:
-<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
-<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
-- [ ] I have read the **CONTRIBUTING.md** document and followed the guidelines there.
-- [ ] I have commented my code, particularly in hard-to-understand areas
-- [ ] I have opened an issue for corresponding changes to documentation (OR no doc changes required)
-- [ ] I have added appropriate tests that prove my change is effective
+## Fixed Issue(s)
+<!-- Please link to fixed issue(s) here using format: fixes #<issue number> -->
+<!-- Example: "fixes #2" -->