Remove defaulter-gen

Nothing was using it.

Author: mdbooth

Makefile

@@ -44,7 +44,6 @@ GO_INSTALL := ./scripts/go_install.sh
 # Binaries.
 CONTROLLER_GEN := $(TOOLS_BIN_DIR)/controller-gen
 CONVERSION_GEN := $(TOOLS_BIN_DIR)/conversion-gen
-DEFAULTER_GEN := $(TOOLS_BIN_DIR)/defaulter-gen
 ENVSUBST := $(TOOLS_BIN_DIR)/envsubst
 GINKGO := $(TOOLS_BIN_DIR)/ginkgo
 GOJQ := $(TOOLS_BIN_DIR)/gojq
@@ -262,7 +261,7 @@ generate: ## Generate code
 
 .PHONY: generate-go
 generate-go: $(MOCKGEN)
-	$(MAKE) -B $(CONTROLLER_GEN) $(CONVERSION_GEN) $(DEFAULTER_GEN)
+	$(MAKE) -B $(CONTROLLER_GEN) $(CONVERSION_GEN)
 	$(CONTROLLER_GEN) \
 		paths=./api/... \
 		object:headerFile=./hack/boilerplate/boilerplate.generatego.txt

hack/tools/Makefile

@@ -69,10 +69,6 @@ CONVERSION_GEN := $(BIN_DIR)/conversion-gen
 $(CONVERSION_GEN): go.mod go.sum | $(BIN_DIR)
 	go build -tags=tools -o $@ k8s.io/code-generator/cmd/conversion-gen
 
-DEFAULTER_GEN := $(BIN_DIR)/defaulter-gen
-$(DEFAULTER_GEN): go.mod go.sum | $(BIN_DIR)
-	go build -tags=tools -o $@ k8s.io/code-generator/cmd/defaulter-gen
-
 ENVSUBST := $(BIN_DIR)/envsubst
 $(ENVSUBST): go.mod go.sum | $(BIN_DIR) # Build envsubst from tools folder.
 	go build -tags=tools -o $@ github.com/a8m/envsubst/cmd/envsubst