Remove fastcgi feature (#9864)

images/fastcgi-helloserver/rootfs/Dockerfile

@@ -1,32 +0,0 @@
-# Copyright 2017 The Kubernetes Authors. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-FROM golang:1.20.4-alpine3.18 as builder
-
-WORKDIR /go/src/k8s.io/ingress-nginx/images/fastcgi
-
-COPY . .
-
-RUN CGO_ENABLED=0 go build -a -installsuffix cgo \
-	-ldflags "-s -w" \
-	-o fastcgi-helloserver main.go
-
-# Use distroless as minimal base image to package the binary
-# Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM gcr.io/distroless/static:nonroot
-
-COPY --from=builder /go/src/k8s.io/ingress-nginx/images/fastcgi/fastcgi-helloserver /
-USER nonroot:nonroot
-
-CMD ["/fastcgi-helloserver"]