remove make run, make go-mod-tidy (#797)

Makefile

@@ -8,7 +8,6 @@ help:
 	@echo ""
 	@echo "available actions:"
 	@echo ""
-	@echo "  mod-tidy        run go mod tidy"
 	@echo "  format          format source files"
 	@echo "  test            run tests"
 	@echo "  test-32         run tests on a 32-bit system"

scripts/mod-tidy.mk

@@ -1,3 +0,0 @@
-mod-tidy:
-	docker run --rm -it -v $(shell pwd):/s -w /s $(BASE_IMAGE) \
-	sh -c "apk add git && GOPROXY=direct go mod tidy"