Drop unneeded kustomize tool

webhosting-operator/Makefile

@@ -134,10 +134,10 @@ kind-down: $(KIND) ## Tear down the kind testing cluster.
 	$(KIND) delete cluster --name webhosting
 
 .PHONY: deploy-ingress-nginx
-deploy-ingress-nginx: $(KUSTOMIZE) $(KUBECTL) ## Deploy ingress-nginx to K8s cluster specified in $KUBECONFIG.
+deploy-ingress-nginx: $(KUBECTL) ## Deploy ingress-nginx to K8s cluster specified in $KUBECONFIG.
 	@# job template is immutable, delete old jobs to prepare for upgrade
 	$(KUBECTL) -n ingress-nginx delete job --ignore-not-found ingress-nginx-admission-create ingress-nginx-admission-patch
-	$(KUSTOMIZE) build config/ingress-nginx/$(OVERLAY) | $(KUBECTL) apply --server-side -f -
+	$(KUBECTL) apply --server-side -k config/ingress-nginx/$(OVERLAY)
 	$(KUBECTL) -n ingress-nginx wait deploy ingress-nginx-controller --for=condition=Available --timeout=2m
 
 # use static label for skaffold to prevent rolling all components on every skaffold invocation

webhosting-operator/tools.mk

@@ -39,11 +39,6 @@ $(KUBECTL): $(call tool_version_file,$(KUBECTL),$(KUBECTL_VERSION))
 	curl -Lo $(KUBECTL) https://dl.k8s.io/release/$(KUBECTL_VERSION)/bin/$(shell uname -s | tr '[:upper:]' '[:lower:]')/$(shell uname -m | sed 's/x86_64/amd64/')/kubectl
 	chmod +x $(KUBECTL)
 
-KUSTOMIZE := $(TOOLS_BIN_DIR)/kustomize
-KUSTOMIZE_VERSION ?= v5.1.0
-$(KUSTOMIZE): $(call tool_version_file,$(KUSTOMIZE),$(KUSTOMIZE_VERSION))
-	GOBIN=$(abspath $(TOOLS_BIN_DIR)) go install sigs.k8s.io/kustomize/kustomize/v5@$(KUSTOMIZE_VERSION)
-
 KYVERNO := $(TOOLS_BIN_DIR)/kyverno
 KYVERNO_VERSION ?= v1.10.3
 $(KYVERNO): $(call tool_version_file,$(KYVERNO),$(KYVERNO_VERSION))