Remove fastcgi feature (#9864)

images/fastcgi-helloserver/cloudbuild.yaml

@@ -1,22 +0,0 @@
-timeout: 1800s
-options:
-  substitution_option: ALLOW_LOOSE
-steps:
-  - name: gcr.io/k8s-staging-test-infra/gcb-docker-gcloud:v20211118-2f2d816b90
-    entrypoint: bash
-    env:
-      - DOCKER_CLI_EXPERIMENTAL=enabled
-      - SHORT_SHA=$SHORT_SHA
-      - BASE_REF=$_PULL_BASE_REF
-      - REGISTRY=gcr.io/k8s-staging-ingress-nginx
-      # default cloudbuild has HOME=/builder/home and docker buildx is in /root/.docker/cli-plugins/docker-buildx
-      # set the home to /root explicitly to if using docker buildx
-      - HOME=/root
-    args:
-    - -c
-    - |
-      gcloud auth configure-docker \
-      && cd images/fastcgi-helloserver && make push
-substitutions:
-  _GIT_TAG: "12345"
-  _PULL_BASE_REF: "master"