ci: Remove confused references to test-event-log.

The "event log" in question was never useful in our test systems (and
hasn't been used for anything real since 2014).  I'm not sure how we
ended up with in the CI configuration.

.circleci/config.yml

@@ -219,10 +219,6 @@ jobs:
           path: ./var/puppeteer/
           destination: puppeteer
 
-      - store_artifacts:
-          path: ../../../tmp/zulip-test-event-log/
-          destination: test-reports
-
       - store_test_results:
           path: ./var/xunit-test-results/casper/
       - *notify_failure_status

.github/workflows/zulip-ci.yml

@@ -149,20 +149,6 @@ jobs:
           name: puppeteer
           path: ./var/puppeteer
 
-      # We cannot use upload-artifacts actions to upload the test
-      # reports from /tmp, that directory exists inside the docker
-      # image. Move them to ./var so we access it outside docker since
-      # the current directory is volume mounted outside the docker image.
-      - name: Move test reports to var
-        run: mv /tmp/zulip-test-event-log/ ./var/
-
-      - name: Store test reports
-        if: ${{ matrix.is_bionic }}
-        uses: actions/upload-artifact@v2
-        with:
-          name: test-reports
-          path: ./var/zulip-test-event-log/
-
       - name: Check development database build
         if: ${{ matrix.is_focal }}
         run: mispipe "tools/ci/setup-backend" ts