Remove push-tar

The release process and `make push` pushes the tar files to
gs://kubernetes-release historically. No one has write permission to the
GCS bucket anymore. We haven't pushed NPD tar files to that GCS bucket
after v0.8.10. k/k has been using NPD v0.8.13+ since 1.29.

This PR cleans up the Make file. NPD release should just include the tar
files in the release note.

Related issues:
- kubernetes#874
- kubernetes#878

Author: wangzhen127

Makefile

@@ -35,11 +35,6 @@ TAG?=$(VERSION)
 # REGISTRY is the container registry to push into.
 REGISTRY?=gcr.io/k8s-staging-npd
 
-# UPLOAD_PATH is the cloud storage path to upload release tar.
-UPLOAD_PATH?=gs://kubernetes-release
-# Trim the trailing '/' in the path
-UPLOAD_PATH:=$(shell echo $(UPLOAD_PATH) | sed '$$s/\/*$$//')
-
 # PKG is the package name of node problem detector repo.
 PKG:=k8s.io/node-problem-detector
 
@@ -264,11 +259,7 @@ endif
 	# Build should be cached from build-container
 	docker buildx build --push --platform $(DOCKER_PLATFORMS) -t $(IMAGE) --build-arg BASEIMAGE=$(BASEIMAGE) --build-arg LOGCOUNTER=$(LOGCOUNTER) .
 
-push-tar: build-tar
-	gsutil cp $(TARBALL) $(UPLOAD_PATH)/node-problem-detector/
-	gsutil cp node-problem-detector-$(VERSION)-*.tar.gz* $(UPLOAD_PATH)/node-problem-detector/
-
-push: push-container push-tar
+push: push-container build-tar
 
 coverage.out:
 	rm -f coverage.out