Update PULL_REQUEST_TEMPLATE.md

Author: ecordell

.github/PULL_REQUEST_TEMPLATE.md

@@ -15,9 +15,8 @@ Note: Make sure your branch is rebased to the latest upstream master.
 - [ ] Implementation matches the proposed design, or proposal is updated to match implementation
 - [ ] Sufficient unit test coverage 
 - [ ] Sufficient end-to-end test coverage
-- [ ] docs updated or added to `/docs` 
-- [ ] commit messages sensible and descriptive
-- [ ] if implementation differs from proposal, proposal is updated to reflect the changes
+- [ ] Docs updated or added to `/docs` 
+- [ ] Commit messages sensible and descriptive
 
 
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