remove external testing reference from Makefile

Makefile

@@ -13,7 +13,7 @@ scribecmd:
 scribevulnpolicy:
 	$(GO) install github.com/mozilla/scribe/scribevulnpolicy
 
-runtests: scribetests gotests
+runtests: gotests
 
 gotests:
 	$(GO) test -v -covermode=count -coverprofile=coverage.out github.com/mozilla/scribe
@@ -21,9 +21,6 @@ gotests:
 showcoverage: gotests
 	$(GO) tool cover -html=coverage.out
 
-scribetests: $(PROJS)
-	cd test && SCRIBECMD=$$(which scribecmd) $(MAKE) runtests
-
 lint:
 	$(GOLINT) $(PROJECT)
 
@@ -41,4 +38,4 @@ clean:
 	rm -f bin/*
 	cd test && $(MAKE) clean
 
-.PHONY: $(PROJS) runtests gotests showcoverage scribetests lint vet clean
+.PHONY: $(PROJS) runtests gotests showcoverage lint vet clean