Revert "Enable tmate debug session for PR workflow"

This reverts commit a395c14.

Author: ansd

.github/workflows/pr.yml

@@ -75,9 +75,6 @@ jobs:
         kind create cluster --image kindest/node:"$K8S_VERSION"
         DOCKER_REGISTRY_SERVER=local-server OPERATOR_IMAGE=local-operator make deploy-kind
         SUPPORT_VOLUME_EXPANSION=false make system-tests
-    - name: Setup tmate session
-      if: ${{ failure() }} # start a debugging tmate session when system tests fail
-      uses: mxschmitt/action-tmate@v3
 
   kubectl_tests:
     name: kubectl rabbitmq tests