Remove pystats (#610)

Removes pystats support from this repo and points folks to the
benchmarking repo.

Author: mdboom

.github/workflows/pystats.yml

@@ -14,4 +14,4 @@ Some links to presentations and other preliminary documentation:
 
 ## Published Results
 
-Benchmarking results are published to the [benchmarking-public repo](https://github.com/faster-cpython/benchmarking-public).
+Benchmarking and pystats results are published to the [benchmarking-public repo](https://github.com/faster-cpython/benchmarking-public).

README.md

@@ -1,24 +1 @@
-This directory contains output from Python built using `--enable-pystats` and run over the pyperformance test suite.
-
-Results are automatically added every Sunday at midnight UTC.
-
-To manually generate a set of results you have write permissions to this repository, you can do one of the following:
-
-- Visit [the pystats workflow](https://github.com/faster-cpython/ideas/actions/workflows/pystats.yml) and press the "Run workflow" button. You can manually select a different fork and branch of CPython to test.
-- In a checkout of this repo, use the `gh` tool:
-
-```bash
-gh workflow run pystats.yml
-```
-
-To manually select a different fork and branch:
-
-```bash
-gh workflow run pystats.yml -f fork=mdboom -f branch=my-changes
-```
-
-Two sets of pystats output can be compared using the [`Tools/scripts/summarize_stats.py`](https://github.com/python/cpython/blob/main/Tools/scripts/summarize_stats.py) script:
-
-```bash
-Tools/scripts/summarize_stats.py pystats-python-abcdef1-2022-01-01.json pystats-python-fedc132-2022-01-03.json
-```
+This directory no longer contains pystats results.  For the latest pystats results, see the [benchmarking repo](https://github.com/faster-cpython/benchmarking).