fix dockerhub login in ci (#306)

* fix dockerhub login in ci

* remove dockerhub login for e2e

Author: freeznet

.github/workflows/e2e_test.yml

@@ -65,13 +65,6 @@ jobs:
         run: |
           git config --global url."https://${ACCESS_TOKEN}:@github.com/".insteadOf "https://github.com/"
 
-      - name: Login to DockerHub
-        uses: docker/login-action@v2
-        with:
-          registry: docker.io
-          username: ${{ secrets.DOCKER_USER }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-
       - name: Set up Ginkgo
         run: |
           go install github.com/onsi/ginkgo/ginkgo@latest
@@ -96,7 +89,6 @@ jobs:
           kind load docker-image --name pulsar-dev docker.cloudsmith.io/streamnative/operators/kubebuilder/kube-rbac-proxy:v0.8.0
           df -h
 
-
       - name: Install Pulsar Operators and sn-platform
         run: |
           helm repo add streamnative https://charts.streamnative.io