Remove testing for aggregate

Author: ianayl

devops/actions/run-tests/benchmark/action.yml

@@ -99,10 +99,3 @@ runs:
     with:
       name: Compute-benchmark run ${{ github.run_id }} (${{ runner.name }})
       path: ./artifact
-  - name: (Test) aggregate benchmark results and produce historical average
-    if: always()
-    uses: ./devops/actions/benchmarking/aggregate
-    with:
-      lookback_days: 999
-    env:
-      GITHUB_TOKEN: ${{ env.GITHUB_TOKEN }}