properly rm MLJFlow from Project [deps]

Author: ablaom

Project.toml

@@ -13,7 +13,6 @@ LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MLJBalancing = "45f359ea-796d-4f51-95a5-deb1a414c586"
 MLJBase = "a7f614a8-145f-11e9-1d2a-a57a1082229d"
 MLJEnsembles = "50ed68f4-41fd-4504-931a-ed422449fee0"
-MLJFlow = "7b7b8358-b45c-48ea-a8ef-7ca328ad328f"
 MLJIteration = "614be32b-d00c-4edb-bd02-1eb411ab5e55"
 MLJModels = "d491faf4-2d78-11e9-2867-c94bc002c0b7"
 MLJTransforms = "23777cdb-d90c-4eb0-a694-7c2b83d5c1d6"