Remove redundant failure-mail step from pipeline (now handled by gitea itself)

.gitea/workflows/tests.yml

@@ -39,17 +39,4 @@ jobs:
       - name: Run tests
         run: cd "${{ gitea.workspace }}" && make test
 
-      - name: Send failure mail
-        if: failure()
-        uses: dawidd6/action-send-mail@v3
-        with:
-          server_address: smtp.fastmail.com
-          server_port: 465
-          secure: true
-          username: ${{secrets.MAIL_USERNAME}}
-          password: ${{secrets.MAIL_PASSWORD}}
-          subject: Pipeline on '${{ gitea.repository }}' failed
-          to: ${{ steps.commiter_info.outputs.MAIL }}
-          from: Gitea Actions <gitea_actions@blackforestbytes.de>
-          body: "Go to https://gogs.blackforestbytes.com/${{ gitea.repository }}/actions"