remove unused open
remove unused open

rgrinberg/merlin,dra27/merlin,the-lambda-church/merlin,ocaml/merlin,the-lambda-church/merlin,rgrinberg/merlin,dra27/merlin,rgrinberg/merlin,dra27/merlin,dra27/merlin,rgrinberg/merlin,the-lambda-church/merlin,ocaml/merlin,ocaml/merlin,ocaml/merlin