[PicaLDAP] Clean unused files

pica-openldap/Makefile

-NAME = pica/openldap
-VERSION = 0.0.1
-
-.PHONY: all build build-nocache
-
-all: build tag-latest
-
-build:
-	docker build -t $(NAME):$(VERSION) --rm .
-
-build-nocache:
-	docker build -t $(NAME):$(VERSION) --no-cache --rm .
-
-tag-latest:
-	docker tag $(NAME):$(VERSION) $(NAME):latest