Remove redundant checklist item

Author: ycombinator

.github/PULL_REQUEST_TEMPLATE.md

@@ -35,7 +35,6 @@ List here all the items you have verified BEFORE sending this PR. Please DO NOT
 - [ ] I have added tests that prove my fix is effective or that my feature works
 - [ ] I have added an entry in `./changelog/fragments` using the [changelog tool](https://github.com/elastic/elastic-agent#changelog)
 - [ ] I have added an integration test or an E2E test
-- [ ] If this PR introduces a breaking change, I've populated the Breaking Change Mitigations section below.
 
 ## Breaking Change Mitigations