remove unused scripts (#814)

Makefile

@@ -13,7 +13,6 @@ help:
 	@echo "  test-32         run tests on a 32-bit system"
 	@echo "  test-e2e        run end-to-end tests"
 	@echo "  lint            run linter"
-	@echo "  bench           run benchmarks"
 	@echo ""
 
 blank :=

scripts/bench.mk

@@ -1,10 +0,0 @@
-bench:
-	echo "$$DOCKERFILE_TEST" | docker build -q . -f - -t temp
-	docker run --rm -it \
-	--network=host \
-	--name temp \
-	temp \
-	make bench-nodocker
-
-bench-nodocker:
-	go test -bench=. -run=^a -v ./pkg/...