test(registry): remove unit tests

the unit tests are outdated, useless and consistently failing. We were
cloning and running the unit tests correctly some months ago, but now
it requires a local redis. Unit tests are covered by
docker/docker-registry, anyways.

Author: Matthew Fisher

registry/Makefile

@@ -30,19 +30,7 @@ full-clean: clean
 test: test-unit test-functional
 
 test-unit:
-	# Requires libevent-dev, libffi-dev, libpython-dev, libssl-dev, liblzma-dev on Ubuntu
-	@if [ ! -d test-unit.tmp ]; then \
-	    git clone -b 0.6.8 https://github.com/dotcloud/docker-registry test-unit.tmp; \
-	fi
-	virtualenv venv
-	venv/bin/pip install -q -r test-unit.tmp/requirements.txt
-	venv/bin/pip install -q -r test-unit.tmp/test-requirements.txt
-	@if [ -d /tmp/test ]; then \
-		rm -rf /tmp/test; \
-	fi
-	cd test-unit.tmp && \
-		DOCKER_REGISTRY_CONFIG=config_test.yml SETTINGS_FLAVOR=test PYTHONPATH=test \
-		../venv/bin/python -m unittest discover -s test
+	@echo no unit tests
 
 test-functional:
 	GOPATH=$(CURDIR)/../tests/_vendor:$(GOPATH) go test -v -timeout 20m ./tests/...