Update PR template

Remove the @mentions because I'm watching the repository and LongLiveCHIEF no longer maintains it.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,14 +1,15 @@
 Fixes # .
 
 Changes Proposed in this Pull Request:
--
--
--
+
+- foo
+- bar
+- baz
 
 I have written tests for:
 
-- [ ] New features introduced
-- [ ] Bugs fixed
-- [ ] Neither (I'm just enhancing tests!)
+[](Remove the `[]()` to uncomment the appropriate lines)
 
-@jazzpi @LongLiveCHIEF
+[](- New features introduced)
+[](- Bugs fixed)
+[](- Neither (I'm just enhancing tests!))