Update pull request template for tests-in-Azure infrastructure

.github/pull_request_template.md

@@ -1,29 +1,19 @@
-Description
-===========
+<!--
+Before submitting a pull request, please ensure that:
 
-
-
-Checklist
-=========
-
-Be sure you've read README.md and understand the scope of this repo.
-
-If you're unsure about a box, leave it unchecked. A maintainer will help you.
-
-- [ ] Identifiers in product code changes are properly `_Ugly` as per
+* Identifiers in product code changes are properly `_Ugly` as per
   https://eel.is/c++draft/lex.name#3.1 or there are no product code changes.
-- [ ] The STL builds successfully and all tests have passed (must be manually
-  verified by an STL maintainer before automated testing is enabled on GitHub,
-  leave this unchecked for initial submission).
-- [ ] These changes introduce no known ABI breaks (adding members, renaming
+
+* These changes introduce no known ABI breaks (adding members, renaming
   members, adding virtual functions, changing whether a type is an aggregate
   or trivially copyable, etc.).
-- [ ] These changes were written from scratch using only this repository,
-  the C++ Working Draft (including any cited standards), other WG21 papers
-  (excluding reference implementations outside of proposed standard wording),
-  and LWG issues as reference material. If they were derived from a project
+
+* Your changes are written from scratch using only this repository, the C++
+  Working Draft (including any cited standards), other WG21 papers (excluding
+  reference implementations outside of proposed standard wording), and LWG
+  issues as reference material. If your changes are derived from a project
   that's already listed in NOTICE.txt, that's fine, but please mention it.
-  If they were derived from any other project (including Boost and libc++,
-  which are not yet listed in NOTICE.txt), you *must* mention it here,
-  so we can determine whether the license is compatible and what else needs
-  to be done.
+  If your changes are derived from any other project, you *must* mention it
+  here, so we can determine whether the license is compatible and what else
+  needs to be done.
+-->