clean up gateway CRD handling

  - the CRD itself was duplicated
  - the makefile rule copied the file twice and then moved it to helm directory; do it in one shot
  - update docs to use kustomize invocation

Author: james-callahan

Makefile

@@ -18,12 +18,6 @@ CRD_OPTIONS ?= "crd:crdVersions=v1"
 # Whether to override AWS SDK models. set to 'y' when we need to build against custom AWS SDK models.
 AWS_SDK_MODEL_OVERRIDE ?= "n"
 
-# Move Gateway API CRDs from bases directory to gateway directory
-MOVE_GATEWAY_CRDS = mv config/crd/bases/gateway.k8s.aws_* config/crd/gateway/
-
-# Copy combined Gateway API CRDs from bases directory to helm directory
-COPY_GATEWAY_CRDS_TO_HELM = cp config/crd/gateway/gateway-crds.yaml helm/aws-load-balancer-controller/crds/gateway-crds.yaml
-
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
 GOBIN=$(shell go env GOPATH)/bin
@@ -67,12 +61,8 @@ manifests: controller-gen kustomize
 	yq eval '.metadata.name = "webhook"' -i config/webhook/manifests.yaml
 
 crds: manifests
-	$(MOVE_GATEWAY_CRDS)
 	$(KUSTOMIZE) build config/crd > helm/aws-load-balancer-controller/crds/crds.yaml
-	$(KUSTOMIZE) build config/crd/gateway > config/crd/gateway/gateway-crds.yaml
-	echo '---' > config/crd/gateway/gateway-crds.yaml
-	$(KUSTOMIZE) build config/crd/gateway >> config/crd/gateway/gateway-crds.yaml
-	$(COPY_GATEWAY_CRDS_TO_HELM)
+	$(KUSTOMIZE) build config/crd/gateway > helm/aws-load-balancer-controller/crds/gateway-crds.yaml
 	$(KUSTOMIZE) build config/crd/aga > helm/aws-load-balancer-controller/crds/aga-crds.yaml
 
 # Run go fmt against code