Merge pull request #956 from turkenf/r-backport

Remove unused backport workflows

Author: turkenf

.github/PULL_REQUEST_TEMPLATE.md

@@ -21,7 +21,6 @@ I have:
 
 - [ ] Read and followed Crossplane's [contribution process].
 - [ ] Run `make reviewable` to ensure this PR is ready for review.
-- [ ] Added `backport release-x.y` labels to auto-backport this PR if necessary.
 
 ### How has this code been tested