Use golangci-lint to match GH Actions; fix deadcode

Author: jmrodri

Makefile

@@ -11,7 +11,25 @@ build: $(SOURCES) ## Build Test
 	go build -i -ldflags="-s -w" ./...
 
 lint: ## Run golint
-	@golint -set_exit_status $(addsuffix /... , $(SOURCE_DIRS))
+	@golangci-lint run --disable-all \
+		--deadline 5m \
+		--enable=nakedret \
+		--enable=interfacer \
+		--enable=varcheck \
+		--enable=deadcode \
+		--enable=structcheck \
+		--enable=misspell \
+		--enable=maligned \
+		--enable=ineffassign \
+		--enable=goconst \
+		--enable=goimports \
+		--enable=errcheck \
+		--enable=dupl \
+		--enable=unparam \
+		--enable=golint \
+		--enable=staticcheck \
+		--enable=unused \
+		--enable=gosimple \
 
 fmt: ## Run go fmt
 	@gofmt -d $(SOURCES)

leader/leader.go

@@ -34,8 +34,7 @@ import (
 type runModeType string
 
 const (
-	localRunMode   runModeType = "local"
-	clusterRunMode runModeType = "cluster"
+	localRunMode runModeType = "local"
 )
 
 // forceRunModeEnv indicates if the operator should be forced to run in either local