Refactor: remove test of make run (#199)

Makefile

@@ -1,5 +1,4 @@
 TARGET := kubelogin
-TARGET_PLUGIN := kubectl-oidc_login
 CIRCLE_TAG ?= HEAD
 LDFLAGS := -X main.version=$(CIRCLE_TAG)
 
@@ -13,13 +12,6 @@ check:
 $(TARGET): $(wildcard *.go)
 	go build -o $@ -ldflags "$(LDFLAGS)"
 
-$(TARGET_PLUGIN): $(TARGET)
-	ln -sf $(TARGET) $@
-
-.PHONY: run
-run: $(TARGET_PLUGIN)
-	-PATH=.:$(PATH) kubectl oidc-login --help
-
 dist:
     # make the zip files for GitHub Releases
 	VERSION=$(CIRCLE_TAG) CGO_ENABLED=0 goxzst -d dist/gh/ -i "LICENSE" -o "$(TARGET)" -t "kubelogin.rb oidc-login.yaml" -- -ldflags "$(LDFLAGS)"
@@ -42,5 +34,4 @@ release: dist
 .PHONY: clean
 clean:
 	-rm $(TARGET)
-	-rm $(TARGET_PLUGIN)
 	-rm -r dist/