Remove localkube from bindata

This makes the minikube build simpler and the the binary smaller.
Localkube will always be remotely fetched and locally cached on the
host.

Makefile

@@ -55,10 +55,6 @@ HYPERKIT_FILES :=  GOPATH=$(GOPATH) go list  -f '{{join .Deps "\n"}}' k8s.io/min
 
 KVM_DRIVER_FILES := $(shell go list -f '{{join .Deps "\n"}}' ./cmd/drivers/kvm/ | grep k8s.io | xargs go list -f '{{ range $$file := .GoFiles }} {{$$.Dir}}/{{$$file}}{{"\n"}}{{end}}')
 
-MINIKUBE_ENV_linux  		:= CGO_ENABLED=1 GOARCH=amd64 GOOS=linux
-MINIKUBE_ENV_darwin  		:= CGO_ENABLED=1 GOARCH=amd64 GOOS=darwin
-MINIKUBE_ENV_windows 		:= CGO_ENABLED=0 GOARCH=amd64 GOOS=windows
-
 # extra env vars that need to be set in cross build container
 MINIKUBE_ENV_darwin_DOCKER 	:= CC=o64-clang CXX=o64-clang++
 
@@ -70,7 +66,7 @@ KUBE_CROSS_DOCKER_CMD := docker run -w /go/src/$(REPOPATH) --user $(shell id -u)
 
 # $(call MINIKUBE_GO_BUILD_CMD, output file, OS)
 define MINIKUBE_GO_BUILD_CMD
-	$(MINIKUBE_ENV_$(2)) go build -tags "$(MINIKUBE_BUILD_TAGS)" --installsuffix cgo -ldflags="$(MINIKUBE_LDFLAGS) $(K8S_VERSION_LDFLAGS)" -a -o $(1) k8s.io/minikube/cmd/minikube
+	GOOS=$(2) go build -tags "$(MINIKUBE_BUILD_TAGS)" --installsuffix cgo -ldflags="$(MINIKUBE_LDFLAGS) $(K8S_VERSION_LDFLAGS)" -a -o $(1) k8s.io/minikube/cmd/minikube
 endef
 
 ifeq ($(BUILD_IN_DOCKER),y)
@@ -188,8 +184,8 @@ ifneq ($(GOPATH)/src/$(REPOPATH),$(PWD))
 	$(warning Warning: Building minikube outside the GOPATH, should be $(GOPATH)/src/$(REPOPATH) but is $(PWD))
 endif
 
-pkg/minikube/assets/assets.go: out/localkube $(GOPATH)/bin/go-bindata $(shell find deploy/addons -type f)
-	$(GOPATH)/bin/go-bindata -nomemcopy -o pkg/minikube/assets/assets.go -pkg assets ./out/localkube deploy/addons/...
+pkg/minikube/assets/assets.go: $(GOPATH)/bin/go-bindata $(shell find deploy/addons -type f)
+	$(GOPATH)/bin/go-bindata -nomemcopy -o pkg/minikube/assets/assets.go -pkg assets deploy/addons/...
 
 $(GOPATH)/bin/go-bindata:
 	GOBIN=$(GOPATH)/bin go get github.com/jteeuwen/go-bindata/...

pkg/minikube/bootstrapper/localkube/localkube.go

@@ -116,14 +116,10 @@ func (lk *LocalkubeBootstrapper) UpdateCluster(config bootstrapper.KubernetesCon
 	var err error
 
 	//add url/file/bundled localkube to file list
-	if localkubeURIWasSpecified(config) && config.KubernetesVersion != constants.DefaultKubernetesVersion {
-		lCacher := localkubeCacher{config}
-		localkubeFile, err = lCacher.fetchLocalkubeFromURI()
-		if err != nil {
-			return errors.Wrap(err, "Error updating localkube from uri")
-		}
-	} else {
-		localkubeFile = assets.NewBinDataAsset("out/localkube", "/usr/local/bin", "localkube", "0777")
+	lCacher := localkubeCacher{config}
+	localkubeFile, err = lCacher.fetchLocalkubeFromURI()
+	if err != nil {
+		return errors.Wrap(err, "Error updating localkube from uri")
 	}
 	copyableFiles = append(copyableFiles, localkubeFile)