Revert "HACK: support using B0 from B0 (for B0 build system)"
Revert "HACK: support using B0 from B0 (for B0 build system)"

This reverts commit 716ba25cddcae17dc53d7f44fe7718342007051a.

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