Do not overwrite `ixsystems/zfs:latest` docker image with ZFS 2.2

.github/workflows/docker_image.yml

@@ -1,28 +0,0 @@
-name: build_image
-
-on:
-  push:
-    branches:
-      - 'truenas/zfs-2.2-release'
-
-jobs:
-  docker:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
-      - name: Login to DockerHub
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Build and push
-        id: docker_build
-        uses: docker/build-push-action@v2
-        with:
-          push: true
-          tags: ixsystems/zfs:latest
-      - name: Image digest
-        run: echo ${{ steps.docker_build.outputs.digest }}