Removed obsolete env var in integration-dind target command

Signed-off-by: Joffrey F <[email protected]>

Author: shin-

Makefile

@@ -32,7 +32,7 @@ integration-test-py3: build-py3
 
 integration-dind: build build-py3
 	docker rm -vf dpy-dind || :
-	docker run -d --name dpy-dind --env="DOCKER_HOST=tcp://localhost:2375" --privileged dockerswarm/dind:1.10.3 docker daemon -H tcp://0.0.0.0:2375
+	docker run -d --name dpy-dind --privileged dockerswarm/dind:1.10.3 docker daemon -H tcp://0.0.0.0:2375
 	docker run --env="DOCKER_HOST=tcp://docker:2375" --link=dpy-dind:docker docker-py py.test tests/integration
 	docker run --env="DOCKER_HOST=tcp://docker:2375" --link=dpy-dind:docker docker-py3 py.test tests/integration
 	docker rm -vf dpy-dind