Update PULL_REQUEST_TEMPLATE.md

Author: oesteban

.github/PULL_REQUEST_TEMPLATE.md

@@ -6,8 +6,7 @@ Pull-request guidelines
 1. If you would like to list yourself as a Nipype contributor and your name is not mentioned please modify .zenodo.json file.
 2. By submitting this request you acknowledge that your contributions are available under the Apache 2 license.
 3. Use a descriptive prefix for your PR: ENH (enhancement), FIX, TST, DOC, STY, REF (refactor), WIP (Work in progress)
-4. The person who accepts/merges your PR will include an update to the CHANGES file: prefix: description (URL of pull request)
-5. Run `make check-before-commit` before submitting the PR.
+4. Run `make check-before-commit` before submitting the PR.
 
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 ## Summary