Merge pull request #1120 from vincepri/remove-old-alpha-types

⚠️ Remove v1alpha4 API types

Author: k8s-ci-robot

Makefile

@@ -324,12 +324,6 @@ generate-go: $(CONTROLLER_GEN) $(CONVERSION_GEN) ## Runs Go related generate tar
 		paths=./... \
 		paths=./$(EXP_DIR)/api/... \
 		object:headerFile=./hack/boilerplate/boilerplate.generatego.txt
-	$(CONVERSION_GEN) \
-		--input-dirs=./api/v1alpha4 \
-		--build-tag=ignore_autogenerated_core_v1alpha4 \
-		--extra-peer-dirs=sigs.k8s.io/cluster-api/api/v1alpha4 \
-		--output-file-base=zz_generated.conversion \
-		--go-header-file=./hack/boilerplate/boilerplate.generatego.txt $(OUTPUT_BASE)
 	go generate ./...
 
 .PHONY: generate-manifests