make: allow optional extra tags when running unit tests

Makefile

@@ -43,8 +43,6 @@ GOTEST := GO111MODULE=on go test
 
 GOVERSION := $(shell go version | awk '{print $$3}')
 GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "./vendor/*")
-GOLIST := go list -deps $(PKG)/... | grep '$(PKG)'| grep -v '/vendor/'
-GOLISTCOVER := $(shell go list -deps -f '{{.ImportPath}}' ./... | grep '$(PKG)' | sed -e 's/^$(ESCPKG)/./')
 
 RM := rm -f
 CP := cp