Makefile: remove make test (#405)

* Makefile: remove make test

The make test is old and not valid anymore. We will add instructions
for running the tests locally in a future PR.

* hack/test: remove hack/test

Author: AlexNPavel

Makefile

@@ -5,9 +5,6 @@ all: format test install
 install:
 	go install github.com/operator-framework/operator-sdk/commands/operator-sdk
 
-test:
-	./hack/test
-
 format:
 	go fmt $(pkgs)