Makefile: fix circular reference for integration-dind

Noticed this warning;

    make: Circular integration-dind <- integration-dind dependency dropped.

Signed-off-by: Sebastiaan van Stijn <[email protected]>

Author: thaJeztah

Makefile

@@ -76,9 +76,6 @@ integration-test: build
 setup-network:
 	docker network inspect dpy-tests || docker network create dpy-tests
 
-.PHONY: integration-dind
-integration-dind: integration-dind
-
 .PHONY: integration-dind
 integration-dind: build setup-network
 	docker rm -vf dpy-dind || :