ci: remove slack notifications

Author: BernhardFuchs

.github/workflows/run-api-tests.yml

@@ -31,9 +31,6 @@ jobs:
           chmod +x ./ci/push-report.sh
           ./ci/push-report.sh
 
-      - name: Send Slack notification for testcases
-        run: npx cypress-slack-reporter --custom-text "Host=https://dev.uniresolver.io/1.0/identifiers/" --ci-provider custom --custom-url https://w3c-ccg.github.io/did-resolution-test-suite --report-dir "gh-pages/${{ env.date_with_time }}/mochareports"
-
       - name: Slack notification
         if: failure()
         uses: 8398a7/action-slack@v3