github: Disable failing Nyrkiö workflow

We can revert this patch once the following issue is fixed:

https://github.com/nyrkio/nyrkio/issues/304

.github/workflows/push_only.yml

@@ -1,34 +0,0 @@
-name: Benchmarks+Nyrkiö
-
-# Pull request support isn't integrated to the github-action-benchmark so run only post-merge
-on:
-  push:
-    branches: [ "main" ]
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  bench:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Bench
-        run: cargo bench | tee output.txt
-
-      - name: Analyze benchmark result with Nyrkiö
-        uses: nyrkio/github-action-benchmark@ec6fe57d80fd83c83c10c6ef3f53899ce993aebb
-        with:
-          name: turso
-          tool: criterion
-          output-file-path: output.txt
-          fail-on-alert: true
-          # Nyrkiö configuration
-          nyrkio-enable: true
-          # Get yours from https://nyrkio.com/docs/getting-started
-          nyrkio-token: ${{ secrets.NYRKIO_JWT_TOKEN }}
-
-          # Old way...
-          # Explicitly set this to null. We don't want threshold based alerts today.
-          external-data-json-path: null
-          gh-repository: null