Revert "Temporary github PR template for sprint (#20055)"

This reverts commit 9119d07.

closes #20071

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,27 +1,3 @@
-Checklist for the pandas documentation sprint (ignore this if you are doing
-an unrelated PR):
-
-- [ ] PR title is "DOC: update the <your-function-or-method> docstring"
-- [ ] The validation script passes: `scripts/validate_docstrings.py <your-function-or-method>`
-- [ ] The PEP8 style check passes: `git diff upstream/master -u -- "*.py" | flake8 --diff`
-- [ ] The html version looks good: `python doc/make.py --single <your-function-or-method>`
-- [ ] It has been proofread on language by another sprint participant
-
-Please include the output of the validation script below between the "```" ticks:
-
-```
-# paste output of "scripts/validate_docstrings.py <your-function-or-method>" here
-# between the "```" (remove this comment, but keep the "```")
-
-```
-
-If the validation script still gives errors, but you think there is a good reason
-to deviate in this case (and there are certainly such cases), please state this
-explicitly.
-
-
-Checklist for other PRs (remove this part if you are doing a PR for the pandas documentation sprint):
-
 - [ ] closes #xxxx
 - [ ] tests added / passed
 - [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`